PG-ThermExpansion
Watts
Thermal Expansion Products
w w w. w a t t s r e g . c o m
GENERAL INFORMATION
Table of Contents
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 – 3
Potable Hot Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Series DET Potable water expansion tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Series PLT Potable water expansion tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Series ILT In-line potable water expansion tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Series DETA ASME pressurized potable water expansion tanks . . . . . . . . . . . . . . . . . . . . . . .8
Series BRV Combination ball valve and relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Series Governor 80-M1 Ball cock and thermal expansion relief valve . . . . . . . . . . . . . . . . .10
Series 530C Calibrated pressure relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Series H32 Hose connection pressure relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Series 276H300/IWTG Water pressure test gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Series SCV Service check valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Non-Potable Hot Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Series ET Non-potable water expansion tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Series ET-ASF Combination packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Series HP Boiler trim-out packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Series HP Bronze Boiler trim-out packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Series ETX, ETSX pressurized expansion tanks for heating and cooling systems . . . . . . . .16
Series ETA ASME pressurized non-potable water expansion tanks . . . . . . . . . . . . . . . . . . .18
Series ET-RA ASME pressurized non-potable water expansion tanks . . . . . . . . . . . . . . . . .19
Watts product specifications in U.S. customary units and
metric are approximate and are provided for reference
only. Watts reserves the right to change or modify
product design, construction, specifications, or materials
without prior notice and without incurring any obligation to
make such changes and modifications on Watts products
previously or subsequently sold.
GENERAL INFORMATION
General Information
What is Thermal Expansion?
When water is heated it expands. For example, water heated from 90ºF (32ºC) to a thermostat setting of 140ºF (60ºC) in a 40 gallon
hot water heater will expand by almost one-half gallon. This is because when water is heated, its density decreases and its volume
expands (see fig. 1). Since water is not compressible, the extra volume created by expansion must go someplace. During no-flow
periods in a system, pressure reducing valves, backflow preventers, and other one-way valves are closed, thus eliminating a path
for expanded water to flow back to the system supply. Hence,
system pressure increases.
figure 1
water
140°F
(60°C)
70°F
(21°C)
Extra volume
of water created by
thermal expansion
has
to go somewhere
180°F
(82°C)
Temperature vs Density
Thermal expansion of water in a closed plumbing system can create a number of annoying and potentially dangerous problems. These
include: the build up of unusually high pressure in a system (even when a pressure reducing valve is installed); pressure surges; and the
chronic or continuous dripping of a temperature and pressure (T&P) relief valve. In addition, dripping faucets and leaking toilet tank ball
cock fill valves are also symptomatic of thermal expansion.
More serious problems can also occur due to thermal expansion. When dangerous pressures are built up in a water heater, internal
parts may fail such as the internal flues, fittings or water connections. If a flue way collapses it can lead to the potential release of
toxic gases, such as carbon monoxide into living spaces. Thermal expansion can also lead to a ruptured or distorted hot water
heating tank and may void the manufacturer’s warranty (see fig.2).
Hot to
System
figure 2
Cold
Hot to
System
Cold
Distorted water heater may void
manufacturer’s warranty.
Installation of a Watts expansion tank
will protect the water heater.
Plumbing codes require you to address this safety problem.
No matter what your thermal expansion problem may be, whether for new construction or for retrofitting or remodeling an existing
system, Watts offers cost effective solutions for you as outlined in the following pages of this guide. Should you require more detailed
information on these products, please feel free to call your local Watts representative, listed on the back of this guide.
1
GENERAL INFORMATION
Plumbing Code Requirements
Thermal Expansion Control
Plumbing codes require that thermal expansion control be addressed in plumbing systems. A temperature and pressure relief
valve is not considered a thermal expansion device. This is because when water is allowed to continuously drip from the T&P
relief valve, minerals from the water can build up on the valve, eventually blocking it. This blockage can render the T&P valve useless
and potentially lead to hot water heater explosions. The International Plumbing Code (IPC), Uniform Plumbing Code (UPC) and
Standard Plumbing Code all require thermal expansion control to be addressed.
Expansion Tank Construction
Section VIII of the ASME Boiler and Pressure Vessel Code states certain requirements that must be met by an expansion tank for it
to meet ASME construction specifications. The Watts Series ETA, ET-RA and DETA tanks all meet these ASME requirements.
Potable vs Non-Potable Systems
Potable refers to water in an open domestic hot water heating system. This is water that could potentially be consumed by people and
is not recirculated within the system. Non-potable refers to water in a closed hydronic heating, radiant floor heating, or a chilled water
system where the water is recirculated and does not leave the system.
Each of these hot water heating systems have different thermal expansion requirements explained in more depth in the following
pages of this guide.
Water Containment vs Water Relief Solutions
Water Containment solutions allow for thermal expansion while containing thermally expanded water in the plumbing system.
The Watts full line of thermal expansion tanks are considered water containment devices. These products require no installation of
discharge lines or drains.
Water Relief solutions discharge thermally expanded water at a pressure setting that is below the setting of the water heater’s
temperature and pressure relief valve. Watts offers a variety of water relief solutions that can be installed on the system piping,
in a water closet or on an outside faucet. These products must be piped to a suitable drain or discharge location.
2
GENERAL INFORMATION
Expansion Tanks
How a Diaphragm Expansion Tank Works
When water is heated in a closed system it expands. Water is not compressible, therefore, the additional water volume created has
to go someplace. When an expansion tank is installed the excess water enters the pre-pressurized tank (figure 3). As the temperature and pressure reaches its maximum, the diaphragm flexes against an air cushion (air is compressible) to allow for increased water
expansion (figure 4). When the system is opened again or the water cools, the water leaves the tank and returns to the system.
figure 3 - How Expansion Tanks work
figure 4
water
water
diaphragm
diaphragm
As the water
temperature increases, the
expanded water is received
by the tank.
As the temperature and
pressure reaches its maximum, the
diaphragm flexes against
the air cushion (air is compressible)
to allow for increased
water expansion.
Note: Expansion tanks are always located on the cold water piping to the water heater or heating system.
Selecting an Expansion Tank
To properly select the correct expansion tank for a system you can either use the selection guide tables which are placed near each
tank series throughout this product guide (see figure 5) or use a formula to determine the tank volume and acceptance volume
requirements. When using a formula it is necessary to know the water heater capacity, the water supply pressure, the starting and
ending water temperatures and the maximum pressure setting of the relief valve.
figure 5
Note: Expansion based on 50°F (10°C) temperature rise.
WATER HEATER
SUPPLY
Gallons (Liters)
PRESSURE
psi
bars 20 (76) 30 (114) 40 (152) 50 (190) 80 (304) 100 (380) 120 (456)
40
2.7
50
3
55
3.7
60
4
70
4.8
80
5.5
90
6
Tank A
100
6.9
Tank B
110
7.5
Tank C
120
8.2
Multiple tanks required
To select the correct expansion tank, using the selection guides in this product guide, choose the supply pressure (for pressures
between those shown, use next highest supply pressure), read across the chart to the correct tank as indicated by the water heater
capacity. For capacities between those shown, use next highest capacity.
To accommodate the thermal expansion required for higher temperature and/or higher pressure systems, multiple tanks may be
used. Please contact your local authorized Watts representative for assistance in sizing expansion tanks for specific applications
requiring multiple tanks.
Other Potable Water Thermal Expansion Solutions
Watts offers several other options for pressure relief besides expansion tanks. These products do not
prevent against loss of water, like an expansion tank, but they do limit high pressure and prevent the annoying
problems associated with thermal expansion. These products include the: Governor 80 combination toilet tank
ball cock fill valve and thermal expansion relief valve; the 530C calibrated pressure relief valve; the BRV combination ball valve and relief valve and the H32 hose connection pressure relief valve. These products are described in
more detail in the following pages of this product guide.
Series BRV
3
POTABLE
Control Thermal Expansion
in Hot Water Supply Systems
Thermal expansion of heated water may occur wherever potable water is heated in a closed system (when the potable water is isolated from the public water supply by a one-way valve, such as a pressure reducing valve, backflow preventer or check valve). Watts
potable water expansion tanks are designed to absorb the increased volume of water created by thermal expansion and to maintain
a balanced pressure throughout the potable water supply system. They are used to prevent plumbing system and/or water heater
damage and unnecessary relief valve discharge caused by excessive pressure from thermal expansion.
WATTS Vacuum Relief Valve
Hot water to
dishwasher and
washing
machine
Tempered Water
to Fixtures†
WATTS Temperature Gauge
WATTS Ball Valves
WATTS DET/PET Water Expansion Tank
WATTS T&P Relief Valve
WATTS Tempering Valve†
WATTS Pressure Gauge
WATTS Water Heater Straps
Water
Heater
WATTS Water Pressure
Reducing Valve
WATTS Backflow Preventer
WATTS Water Heater Stand
Water Meter
WATTS Shut-off Valve
Water Supply
WATTS Floor Drain
†ASSE 1016 – Listed valves such as the Watts L111, MMV or USG should be used at point-of-delivery.
4
POTABLE
Series DET
Potable Water Expansion Tanks for Water
Heaters and Hot Water Supply Systems
Models DET-5-M1, DET-12-M1,
DET-20-M1 and DET-35-M1
Series DET potable water expansion tanks are designed
to absorb the increased volume of water created when
the hot water storage tank is heated and to keep the
system pressure below the relief setting of the T&P relief
valve. It is a pre-pressurized steel tank with an expansion
membrane that prevents contact of the water with the air
in the tank. This prevents loss of air to the water and
ensures long and trouble-free life for the system. These
tanks may be used with all types of direct fired water
heaters (gas, oil or electric) and hot water storage tanks.
Standards: DET-5-M1, DET-12-M1,
DET-20-M1, and DET-35-M1 are
Listed by IAPMO.
Features
NSF
R
• Rugged flexible butyl diaphragm
• Field adjustable pre-charge
• In-line and free standing models
Selection Guide
• Can be used with most standard water
heaters and storage tanks
WATER HEATER
Gallons (Liters)
SUPPLY
PRESSURE
• Made in U.S.A.
Specifications
The potable water expansion tank shall be of drawn steel construction. It shall have a butyl diaphragm separating the air
chamber from the water containing chamber. Inlet connector
shall be brass model (DET-35-M1: stainless steel). Materials of
manufacture for the diaphragm shall be FDA approved.
The potable water expansion tank shall be a Watts Model
DET__(5, 12, 20, 35)-M1.
Note: Watts Series DET-M1 potable water expansion tanks
shall be installed on the cold water service pipe line on the
supply side of the water heater or water storage tank.
psi
bars 20 (76) 30 (114) 40 (152) 50 (190) 80 (304) 100 (380) 120 (456)
40
2.7
50
3
55
3.7
60
4
70
4.8
80
5.5
90
6
100
6.9
110
7.5
120
8.2
DET-5-MI
DET-20-M1
DET-12-M1
DET-35-M1
Multiple tanks required - consult authorized Watts agent
This table is based upon a relief valve setting of 150psi
(10 bars), a maximum of 40°F (4°C) temperature rise, and
a 40psi (2.7 bars) precharge.*
*It is recommended that tanks be precharged to supply pressure
(up to 80psi (5.5 bars)). Equalizing precharge pressure to supply
pressure increases the application range over those shown in
the table.
For additional information, request literature ES-DET.
Model
Connection
Size (DN)
DET-5-M1
DET-12-M1
DET-20-M1
DET-35-M1
34
in.
⁄ M
3⁄4 M
3⁄4 M
1M
Max
Pressure
Max
Temp.
Tank
Volume
Tank
Acceptance
Air
Pre-charge
Dia.
mm
psi
bars
°F
°C
Gal.
Liters
Gal.
Liters
psi
bars
in.
20
20
20
20
150
150
150
150
10
10
10
10
200
200
200
200
93
93
93
93
2.1
4.5
8.5
14
8
17
32
53
.85
1.8
3.2
5.6
3
8
12
21
40
40
40
40
217
217
217
217
81⁄2
10
121⁄2
16
mm
Length
in.
216 111⁄2
254
15
318 1913⁄16
407 2111⁄16
Weight
mm
lbs.
kgs.
293
381
488
552
7
10
15
32
3.2
4.6
6.8
14.6
5
POTABLE
Series PLT
Potable Water Expansion Tanks
Models PLT-5 and PLT-12
Series PLT Potable Water Expansion Tanks are designed
to absorb thermal expansion and to maintain balanced
pressure throughout the potable water supply system.
Heated water expands, and in a domestic hot water
system the system may be closed when isolated from
the public water supply by a one-way valve, pressure
reducing valve, backflow preventer, check valve, etc.
Provisions must be made for this expansion.
Series PLT expansion tanks absorb the increased volume of water created when the hot water storage tank
is heated and keeps the system pressure below the
relief setting of the T&P relief valve. It is a pre-pressurized steel tank with an expansion membrane that prevents contact of the water with the air in the tank. This
prevents loss of air to the water and ensures long and
trouble-free life for the system. These tanks may be
used with all types of Direct Fired Hot Water Heaters
(gas, oil or electric) and hot water storage tanks.
Model PLT-5
Model PLT-12
Standards: PLT-5 and
PLT-12 are Listed by IAPMO.
NSF
R
Certified to ANSI/NSF61
Features
Selection Guide
• Polypropylene liner
WATER HEATER
Gallons (Liters)
• Rugged flexible butyl diaphragm
SUPPLY
PRESSURE
• Field adjustable pre-charge
psi
bars 20 (76) 30 (114) 40 (152) 50 (190) 80 (304) 100 (380) 120 (456)
• Can be used with most standard water heaters and storage
tanks
40
2.7
50
3
• Made in Taiwan
55
3.7
Specifications
The potable water expansion tank shall be of drawn steel construction and include a rigid polypropylene reservoir liner. It
shall have a butyl diaphragm separating the air chamber from
the water containing chamber. Inlet connector shall be stainless steel lined. Materials of manufacture for the liner and
diaphragm shall be FDA approved. The potable water expansion tank shall be a Watts Regulator Company Series PLT.
60
4
70
4.8
80
5.5
90
6
100
6.9
110
7.5
120
8.2
PLT-5
PLT-12
Multiple tanks required - consult factory
This table is based upon a relief valve setting of 150psi (10 bars),
a maximum of 40°F (4°C) temperature rise, and a 40psi (2.7 bars)
precharge.*
*It is recommended that tanks be precharged to supply pressure
(up to 80psi (5.5 bars)). Equalizing precharge pressure to supply
pressure increases the application range over those shown in
the table.
For additional information, request literature ES-PLT.
Model
Connection
Size (DN)
in.
Max.
Pressure
Max.
Temp.
Tank
Volume
Tank
Acceptance
Air
Pre-charge
Diameter
liters
gal.
liters
psi
bars
in.
mm
mm
psi
bars
˚F
˚C
gal.
PLT-5
34
20
150
10
200
93
2.1
8
1.26
4.8
40
217
8
PLT-12
34
20
150
10
200
82
4.5
17
2.8
10.6
40
217
101/2
6
⁄ M
⁄ M
Length
Weight
in.
mm
lbs.
kgs.
203
11
279
5.5
2.5
267
131/2
343
10
4.5
POTABLE
Series ILT
In-Line Potable Water Expansion Tanks
Models ILT-5 and ILT-12
Model
ILT-12
Series ILT in-line potable water expansion tanks are
designed to absorb the increased volume of water created
when the hot water storage tank is heated and keeps the
system pressure below the relief valve setting of the T&P
relief valve. It is a pre-pressurized steel tank with an expansion membrane that prevents contact of the water with the
air in the tank. This prevents loss of air to the water and
ensures long and trouble-free life for the system.
The ILT’s flow-through design provides safer and healthier
drinking water by virtually eliminating stagnant water in the
plumbing system that can promote microbial growth. The
ILT features a compact design that allows it to be installed
where other expansion tanks cannot. These tanks maybe
used with all types of direct fired hot water heaters (gas,
oil or electric) and hot water storage tanks.
Model
ILT-5
Patent # 6,418,969
Standards: Models ILT-5 and
ILT-12 Listed by IAPMO.
Features
AIR CHAMBER
• Flow through design virtually eliminates microbial growth
WATER
• Rugged flexible butyl diaphragm
AIR CHAMBER
• Field adjustable pre-charge
• Can be used with most standard hot water heaters and
storage tanks
• Available with threaded, solder or PEX end connections.
Selection Guide
WATER HEATER
Gallons (Liters)
SUPPLY
PRESSURE
• Made in U.S.A.
Specifications
The potable water expansion tank shall be of steel construction. It shall be of flow through design. It shall have
a butyl diaphragm separating the air chamber from the
water containing chamber. Inlet and outlet connectors
shall be union thread/sweat or PEX. Materials of manufacture for diaphragm shall be FDA approved.
The potable water expansion tank shall be a Watts
Model ILT__(5,12).
psi
bars 20 (76) 30 (114) 40 (152) 50 (190) 60 (228) 70 (266) 80 (304) 100 (380) 120 (456)
40
2.7
50
3
55
3.7
60
4
70
4.8
80
5.5
90
6
100
6.9
ILT-5
ILT-12
Multiple tanks required - consult authorized Watts agent
This table is based upon a relief valve setting of 150psi (10 bars), a maximum
of 40°F (4°C) temperature rise, and a 40psi (2.7 bars) precharge.*
For additional information, request literature F-ILT.
Model
Size (DN)
in.
ILT-5
ILT-12
34
⁄ F
3⁄4 F
Connection
Pressure
*It is recommended that tanks be precharged to supply pressure (up to 80psi
(5.5 bars)). Equalizing precharge pressure to supply pressure increases the
application range over those shown in the table.
Max
Temp.
Max
Volume
Tank
Acceptance
Tank
Pre-charge
Air
Dia.
Length
mm
psi
bars
°F
°C
Gal.
Liters
Gal.
Liters
psi
bars
in.
mm
in.
20
20
150
150
10
10
160
160
71
71
1.20
1.93
4.5
7.3
1.15
1.85
4.3
7
40
40
2.7
2.7
4
4
101.6
101.6
31
46
mm
Weight
lbs.
787.4 91⁄2
1168.4 131⁄2
kgs.
4.3
6.1
7
POTABLE
POTABLE — ASME
Series DETA
ASME Pressurized Expansion Tanks for
Potable Hot Water
Models DETA 5 – DETA 210
Series DETA tanks are ASME fixed bladder type precharged expansion tanks for commercial and industrial
fresh potable hot water applications. They are designed
to accept the expanded volume of hot water keeping the
system pressure below the relief valve setting. The water
is contained in a butyl bladder.
Maximum Design Pressure: DETA 5 – DETA 210:
150psi (10 bars)
Precharged to 40psi (2.7 bars)
Maximum Design Temperature: 240°F (115°C)
Features
Charging
Valve
System
Connection
• ASME Section VIII construction
System
Connection
Lift
Ring
• Fixed butyl bladder (FDA approved)
Charging
Valve
• Stainless steel system connection
• Precharged to 40psi (2.7 bars)
(field adjustable)
O.A.H.
• Shell: carbon steel
Dia.
• System connection: stainless steel
O.A.H.
• Bladder: butyl (FDA approved)
• Primer coated exterior
Dia.
DETA 5 and DETA 12
Specifications
Furnish and install as shown on plans a Watts Model DETA
____ gallon ____ " diameter x ____" (high) pre-charged steel
thermal expansion tank with a fixed butyl bladder. The tank
shall have a top NPT stainless steel system connection and a
.302" – 32" (7.6 – 812.8mm) charging valve connection (standard tire valve) to facilitate the on-site charging of the tank to
meet system requirements. The tank must be constructed in
accordance with Section VIII of the ASME Boiler and Pressure
Vessel Code.
C
DETA 20 – DETA 210
For additional information, request literature ES-DETA.
Model
System
Connection
(DN)
in.
mm
Tank
Volume
Gallons
3⁄4
DETA 5
20
3.5
3⁄4
DETA 12
20
5
3⁄4
DETA 20
20
8
DETA 30
1
25
15
DETA 42
1
25
22
DETA 60
1
25
26
DETA 80
1
25
35
DETA 100
1
25
45
DETA 125
1
25
60
DETA 160
11⁄2
40
70
DETA 180
11⁄2
40
80
DETA 210
11⁄2
40
90
Lift ring on models DETA 42 – DETA 210.
8
Acceptance
Volume
Max.
Operating
Pressure
Dimensions (approx.)
Dia.
Weight
Height
C
Liters
Gallons
Liters
psig
bars
in.
mm
in.
mm
in.
mm
lbs.
kgs.
13
19
30
57
84
99
133
171
228
266
304
342
2.1
3.1
3.1
10.5
15.5
15.5
15.5
21
21
52.5
52.5
52.5
8
11.7
11.7
40
59
59
59
80
80
199.5
199.5
199.5
150
150
150
150
150
150
150
150
150
150
150
150
10
10
10
10
10
10
10
10
10
10
10
10
10
12
12
16
16
16
16
20
20
24
24
24
254
305
305
406
406
406
406
508
508
610
610
610
14
14
20
33
32
34
45
38
49
46
49
52
356
356
508
838
813
864
1143
965
1245
1676
1168
1321
–
–
10
12
14
14
14
18
18
22
22
22
–
–
254
305
356
356
356
457
457
559
559
559
22
28
34
64
88
93
109
148
175
259
268
283
10
13
15
29
40
42
49
67
79
117
122
128
POTABLE
POTABLE
— ASME
Series BRV
BRVT
Combination Ball Valve and Relief Valve
Series BRV combination ball valve and relief valve provides a
unique and low cost solution for thermal expansion relief in
domestic water heating systems, using a rugged ball valve
design. The small and compact BRV facilitates relief of thermal
expansion and provides a tight shutoff valve for the supply to
the water heater.
BRVP
Features
BRVPxTxP
• Easy installation - Installs in any position
• Low profile design
• Full port ball valve with virgin PTFE seats
• Blowout proof stem
• Stainless steel spring/Viton® ball relief valve components
• Secure compression or PEX end fitting drain tube connection
Typical Installation
Specifications
Water heater shutoff valve shall include built-in relief protection
from water pressure in excess of __(80, 100, 125 psi). Each valve
shall be full port construction, bronze ASTM B-584 body, electroless nickel plated ASTM B-16 or B-124 brass ball, blowout proof
ASTM B-16 brass stem, virgin PTFE seats, PTFE stem packing
and stem thrust bearing, Viton® relief ball and 302 stainless steel
relief spring. Valves shall include 3⁄8" (10mm) brass compression or
PEX connection for drain line. Valve shall be IAPMO listed. Valve
shall be a Watts Regulator Company Series BRV.
Maximum temperature: 210°F (90°C)
Maximum pressure: valve body rated to 400psi (28 bar)
Ball
Valve
Watts T&P
Relief Valve
Watts Vacuum
Relief Valve
Relief
Valve
Hot to
system
Watts
Tempering
Valve
Drain Tube
For additional information, request literature ES-BRV.
Available Models
Watts Test Plug
and Gauge
Inlet
Outlet
Relief Outlet
Sweat
Thread
PEX
PEX
PEX
PEX
PEX
Thread
Sweat
Sweat
Thread
PEX
Thread
Thread
Sweat
Sweat
PEX
PEX
Compression
Compression
Compression
Compression
PEX
Compression
PEX
Compression
Compression
Watts
Water
Heater
Straps
Watts Backflow
Preventer
Watts Shutoff
Water Meter
Watts Water
Heater Stand
Cold
Watts Water Pressure
Reducing Valve
Available Pressure Settings: 80, 100, 125psi
Viton® is a registered trademark of DuPont Dow Elastomer
9
POTABLE
POTABLE
Governor 80-M1
Ball Cock and Thermal Expansion Relief Valve
The Governor 80-M1 is a unique product that solves three
plumbing problems at once and offers the most cost effective
way to ensure code compliance for domestic water systems
Toilet Tank Ball Cock Fill Valve
The Governor 80-M1 is a toilet tank ball cock fill valve that incorporates the simplest “full flow” ball cock principle available, assuring built in reliability. Its large, non-clogging flow way promotes
quiet operation and snap action shutoff under a wide range of
pressures. The Governor 80-M1’s construction uses PVC and
Celcon® to make it completely non-electrolytic and non-corrosive.
Patent #4,745,945
Cap Ring
Thermal Expansion/Pressure Relief Valve
The Governor 80-M1 gets its name from its ability to govern
or limit the domestic water system’s preset pressure to 80psi
(5.5 bars) as required by code. It protects the primary safety
valve on the water heater (the temperature and pressure relief
valve) from unnecessary blow-off or discharge, which can
cause potentially dangerous problems and costly water damage.
The Governor 80-M1 discharges any extra volume of water
generated by thermal expansion into the water closet, eliminating the need for the installation of more expensive expansion
tanks and auxiliary relief valves and their discharge lines.
Anti-Siphon Backflow Preventer
The Governor 80-M1 is also an anti-siphon backflow preventer
and protects against backflow from water closets, a serious cross
connection. This added protection ensures that water from the
water closet will not contaminate the potable water supply.
Float Rod
Thermal
Expansion
Relief Valve
10" (254mm),
111⁄2" (292mm)
or
121⁄2" (317mm)
Refill Tube
Features
Black Rubber Gasket
• Limits and governs the domestic water system’s preset
static pressure to 80psi (5.5 bars) as required by code
Lock Nut
• Protects the Temperature and Pressure Relief Valve on the
water heater from unnecessary relief discharge, reserving it
for true emergencies
• Reduces the need to use a more expensive thermal expansion
tank or auxiliary relief valve which require a drain line
• Prevents backflow from water closets, a serious
cross connection
• ASSE 1002 certified and meets IAPMO and CSA requireents
for anti-siphon ball cocks
TYPICAL WATER CLOSET
Water Supply Coupling Nut
Specifications
The Watts Governor 80-M1 is tested and certified under
ASSE Standard 1002 and meets IAPMO, and CSA requirements for anti-siphon ball cocks. All materials in contact with
water are FDA approved under DVR-21-177-2600. The thermal expansion relief valve is standardly set at 80psi (5.5 bars)
to meet existing codes and is non-adjustable. Standard
lengths are: 10", 111⁄2" or 121⁄2" (254, 292 or 317mm).
“WATTS® Governor 80-M1”
Ordering Information
“W.O.L.”
“C.L.”
1"
Float Ball
Thermal
Expansion
Relief Valve
Overflow
Tube
“C.L.” (Critical level established)
“W.O.L.” (Water overflow level)
10
Celcon® is a registered trademark of Celanese, Limited.
Model
Gov. 80-M1-10
Gov. 80-M1-11.5
Gov. 80-M1-12.5
IAPMO listed
Size (DN)
in.
mm
10
111⁄2
121⁄2
254
292
317
B125
1002
For additional information, request literature S-GOV80.
POTABLE
Series 530C
Manually
adjustable
Calibrated Pressure Relief Valves
Series 530C are spring operated bronze relief valves
designed to be used only as protection from the build
up of excessive pressure in systems containing water,
oil or air.
Series 530C are not ASME approved safety relief valves
and should not be used in system applications with
this requirement.
Series 530C incorporates a calibrated adjustment
feature for manually setting the valve to the relief
pressure required.
Typical Installation
Features
Hot
• Calibrated adjustment feature for setting valve to relief
pressure required
Cold
• Adjustable range 50 – 175psi (3.45 – 12.06 bars)
• All bronze construction
Water
Heater
• All stainless steel springs
• Buna-N disc on machined body seat
Slop sink
or drain
Specifications
12
Watts auxiliary thermal
expansion pressure
relief valve Series 530C
Cold Supply
34
Sizes ⁄ " and ⁄ " (15 & 20mm).
Inlet (bottom) male threaded, NPT.
Outlet (side), female threaded, NPT.
Auxiliary relief
valve can be
installed on
either hot or
cold piping
One-way Flow Device
Model
530C
530C
Size (DN)
Height
Width
Weight
in.
mm
in.
mm
in.
mm
lbs.
gm.
12
15
20
3
3
76
76
15⁄8"
15⁄8"
41
41
.63
.63
286
286
⁄
3⁄4
For additional information, request literature ES-530C.
Series H32
Hose Connection Pressure Relief Valve
Typical Installation
The H32 hose connection pressure relief valve, set at
80psi (5.5 bars) or 100psi (6.8 bars), has a 3⁄4" (20mm)
hose connection inlet for ease of installation.
The H32 should only be used in areas where the outside
temperature does not fall below freezing year round.
Model
H32-100
H32-80
Size (DN)
in.
mm
34
20
20
⁄
⁄
34
Model H32
11
DETECTION AND SERVICING SOLUTIONS
Series 276H300, IWTG
(A)
Water Pressure Test Gauge
(B)
Ideal to accurately determine system pressure in a building. The 3⁄4" (20mm) hose connection easily attaches to a
hose bibb or the drain connection on a water heater. A
red indicator hand holds at the highest reading registered. When left on overnight, it will register the highest
pressure in the system during that period.
(A)
34
⁄ " (20mm) H.T. Hose Connection which easily attaches to an outside
hose bibb or to the drain connection on a water heater.
(B)
Series 276H300
A Red indicator hand that “HOLDS” at the highest reading registered, to record shock pressure or when left on overnight will register
the highest surge pressure which occurred during that period.
(C)
Model
(C)
Size (DN)
12
Features a large (2 ⁄ " (65mm)) face for easy reading.
276H300
IWTG
in.
mm
34
20
20
⁄
3⁄4
Range
psi
bars
0 – 300 0 – 21
0 – 200 0 – 14
Series SCV
Service Check Valves
Series SCV service check valves facilitate the
servicing of components in systems under
pressure. They install between the system and
the component.
As the component is threaded into the Service
Check Valve, the spring loaded valve opens to
system pressure.
As the component is removed, the valve closes, maintaining system integrity while the component is being inspected. This prevents having to drain the entire system each time a component is serviced.
Available in sizes
⁄ ", 1⁄4", 3⁄8", 1⁄2" and 3⁄4" (3.2, 6.3, 9.5, 12.7, 20mm) inches.
Max. Temperature: 240°F (115°C), Max. Pressure: 150psi (10 bars)
18
Typical Installation
System
Open
Model.
SCV
SCV
SCV
SCV
SCV
System
Closed
Size (DN)
in.
mm
18
3.2
6.4
9.5
12.7
20
⁄
1⁄4
3⁄8
1⁄2
3⁄4
Note: This device is not to be used on safety relief
valves or other safety or flow sensitive components.
Important: System pressure must be reduced prior
to removing system component.
System Component
12
NON-POTABLE
Control Thermal Expansion
in Hot Water Heating Systems
18
†
17
7
Hot
9
Cold to Fixtures
Thermal expansion of heated water may occur wherever water is heated in a closed system (when the boiler water is isolated from
the public water supply by a one-way valve, such as a feed water pressure reducing valve, backflow preventer, check valve, etc.).
Watts non-potable water expansion tanks are designed to absorb the increased volume of water caused by thermal expansion and
maintain a balanced pressure throughout the hot water heating system. They are used to prevent system damage and unnecessary
relief valve discharge caused by excessive pressure from thermal expansion.
†
16
7
14
19
1
6
10
4
2
15
Return
20
Return
13
12
11
11
15
8
21
5
15
15
4a
3
1
2
3
4
4a
5
6
7
8
9
10
Air Scoop
Backflow Preventer
Boiler Drain Valve
Boiler Fill Valves
Combination Fill Valve
and Backflow Preventer
Bronze Check Valve
Expansion Tank
Flow Checks
Flow Control Valve
Gate or Globe Valves
Mixing Valves
†
†
11
12
13
14
15
16
17
18
19
20
21
Purge Valves
Pressure Relief Valves
Hot Water Boiler Safety Relief Valve
T&P Test Plug
Ball Valve
Float Vent Valve
Automatic Float Vent Valve
Water Pressure Reducing Valve
1⁄8" (3mm) or 1⁄4" (8mm) Service Check Valves
1⁄2" (15mm) Service Check Valve
Combination Temperature
& Pressure Gauge
† Choose one item #16 or #17
13
NON-POTABLE
Features
Series ET
•
•
•
•
Steel construction
Rugged flexible diaphragm
Precharged at 12psi (82 kpa)
Compact size saves space
and energy
• Compatible with glycol in systems
Non-Potable Water Expansion Tanks for Hot
Water Heating Boilers and Systems
Models ET-15, ET-30, ET-60, ET-90
Series ET nonpotable water expansion tanks are designed to absorb the increased volume of water created
when the hot water boiler is heated and keep the system
pressure below the relief setting of the relief valve. Series
ET is a pre-pressurized steel tank with an expansion
membrane that prevents contact of the water with the air
in the tank. This prevents loss of air to the water and
ensures long and trouble-free life for the system.
ET
ET SERIES SIZING CHART
Precharge: 12psi (82 kpa)
Relief Pressure: 30psi (206.7 kpa)
System Operating Temperature: 200°F (93°C)
Note: Watts ET Series non-potable water expansion tank may
be installed in a tee or any other suitable tapping in the heating
system and can be installed in a vertical or horizontal position.
Selection Guide
As an alternative to using a formula, you can use this Quick
Reference Sizing Chart to select the correct tank for your system. This table is based upon a tank pre-charge of 12psi (82
kpa), a pressure relief valve setting of 30psi (2 bars) and a system operating temperature of 200°F (93°C). The chart takes
into account typical system water volumes based upon boiler
BTU’s and type of radiation installed. Simply go to the boiler
output BTU equal to or higher than the installed boiler, read
across the chart to the correct tank model as indicated by the
type of system radiation column on the chart.
Boiler
Output
Net BTU’s
Finned
Tube
Baseboard
25,000
50,000
75,000
100,000
125,000
150,000
175,000
200,000
250,000
300,000
ET-15
ET-15
ET-30
ET-30
ET-30
ET-30
ET-60
ET-60
ET-60
ET-90
TYPE OF RADIATION
Convectors
or
Radiators
Unit Heaters
Cast Iron
ET-15
ET-15
ET-30
ET-30
ET-60
ET-60
ET-60
ET-60
ET-90
—
ET-15
ET-30
ET-30
ET-60
ET-60
ET-90
—
—
—
—
Baseboard
Cast Iron
ET-15
ET-30
ET-60
ET-60
ET-90
ET-90
—
—
—
—
For additional information, request literature ES-ET.
Model
ET-15
ET-30
ET-60
ET-90
Size (DN)
Tank Conn.
Volume
Volume
Acceptance
Dia.
Length
Weight
in.
mm
Gals.
Liters
Gals.
Liters
in.
mm
in.
mm
lbs.
kgs.
12
15
15
15
20
2.1
4.7
6.6
13.0
8
17.8
25
49
1.4
3.0
4.3
8.0
5.3
11.4
16.3
30.4
713⁄16
105⁄8
123⁄16
15
198
269
310
381
1113⁄16
15
15
211⁄8
300
381
381
536
5
8
14
26.5
2.3
3.7
6.3
12.0
⁄
1⁄2
1⁄2
3⁄4
Series ET-ASF
Combination Packages
FV4-M1
Series ET-ASF hydronic boiler combination packages
make it easier to buy system components by including
an ET expansion tank, AS air scoop, and FV4-M1 float
vent valve all in one package and for a lower cost than
buying each of the components separately.
Model
Float Vent
FV-4M1
1" (25mm) 11/4" (32mm) 1/8" (3mm) 1/8" (3mm)
Combination Packages
ET-15-ASF
ET-15-ASF
ET-30-ASF
ET-30-ASF
ET-60-ASF
ET-60-ASF
14
Air Scoop
X
X
X
X
X
X
X
X
X
X
X
X
AS 1" (25mm)
or 11⁄4" (32mm)
Expansion Tank
ET-15
ET-30 ET-90
X
X
X
X
X
X
ET-15, ET-30
or ET-60
NON-POTABLE
Series HP
Boiler Trim-Out Packages
Series HP boiler trim-out packages contain all the essential trim-out components of a quality boiler installation in a single easy to carry package.
Package Includes:
18
⁄ " (3mm), FV4-M1 Float Vent
18
⁄ " (3mm) SCV
AS Air Scoop 1" or 11⁄4" (25 or 32 mm)
911S or B911S
Combination
Backflow
Preventer
and Boiler
Fill Valve
12
⁄ " (13mm) SCV ET-30
Expansion Tank
Package Selection Chart
Model
Service
Check Valve
1" (25mm) 11/4" (32mm) 1/8" (3mm) 1/2" (15mm)
Boiler Trim-out Packages
HP-C
HP-D
HP-15C
HP-15D
HP-30 BC
HP-30 BD
HP-15 BC
HP-15 BD
HP-15 BF
HP-30 BF
HPP
Air Scoop
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Float Vent
FV-4M1
DuoVent
1/8" (3mm)
1/8" (3mm)
X
X
X
X
X
X
X
X
X
X
X
Fill Valve
B1156
X
X
X
X
Fill Valve/
Backflow Preventer
911S
B911S
Flow Check
2000S-M5
1" (25mm)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Expansion Tank
ET-15
ET-30
X
X
X
X
X
X
X
X
X
X
X
Series HP Bronze
Bronze Boiler Trim Packages
Series HP bronze boiler trim packages contain all the essential trim-out components of a quality boiler installation in a single easy
to carry package. These packages include a bronze air scoop and bronze combination fill valve/backflow preventer.
Package Includes:
12
⁄ " FV4-M1 Float Vent
12
⁄ " SCV Service Check
1" or 11⁄4" AS-B Air Scoop
⁄ " SCV Service Check
12
ET-30 or ET-15 Expansion Tank
B911S Combination Backflow
Preventer and Boiler Fill Valve
Package Selection Chart
MODEL
AIR SCOOP
SERVICE
CHECK VALVE
AS-B-S
1"
HP-15C-AB-S
HP-15D-AB-S
HP-15C-AB-T
HP-15D-AB-T
HP-30C-AB-S
HP-30D-AB-S
HP-30C-AB-T
HP-30D-AB-T
12
⁄"
FV-4M1
1⁄2"
FILL VALVE/
BACKFLOW PREVENTER
B911S
1⁄2"
2
2
2
2
2
2
2
2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
AS-B-T
11⁄4"
1"
11⁄4"
X
X
X
X
X
X
X
X
FLOAT VENT
EXPANSION TANK
ET-15
1⁄2"
ET-30
1⁄2"
X
X
X
X
X
X
X
X
15
NON-POTABLE
Series ETX, ETSX
Pressurized Expansion Tanks for
Heating and Cooling Systems*
Series ETX and ETSX Pressurized Expansion Tanks for
Heating and Cooling Systems are designed to absorb
the increased volume of water created when water is
heated. These tanks maintain system pressure below
the relief setting of the relief valve. The Series ETX and
ETSX’s pre-pressurized steel tank features a durable
expansion membrane that prevents contact of the
water with the air in the tank. This rugged diaphragm
minimizes loss of the air change and ensures long and
trouble-free life for the system.
Series ETX
Features
•
•
•
•
•
Precharged at 12psi (82.7 kPa)
Rugged flexible butyl diaphragm
In-line and free standing models
Compatible with glycol in systems
Steel construction
Models
ETX
ETSX
Mounts to supply piping
Free standing
Specifications
Furnish and install as shown on plans a Watts Model
ETX/ETSX _____ gallon _____ “ diameter x ____ “ (high) precharged steel expansion tank with a fixed butyl bladder. The
tank shall have an NPT system connection and a .302”-32
charging valve connection (standard tire valve) to facilitate the
on-site charging of the tank to meet system requirements.
The tank shall be factory precharged to 12psi. The tank shall
be a Watts Regulator Company Series ETX or ETSX.
Maximum Working Temperature: 240˚F (115˚C)
Maximum Working Pressure:
ETX-15, ETX-30, ETX-60: 75psi (517 kPa)
ETX-90 and ETSX Series: 100psi (6.89 bars)
Precharge (field adjustable): 12psi (82.7 kPa)
*Not for use on potable water systems.
16
Series ETSX
NON-POTABLE
Quick Sizing Chart
Boiler Output
Net BTU/H
Finned Tube
Baseboard
Convectors
or Unit Heaters
Suggested Selection
Cast Iron
Radiators
Cast Iron
Baseboard
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
125,000
150,000
175,000
200,000
250,000
300,000
350,000
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
1,200,000
1,400,000
1,500,000
ETX-15
ETX-15
ETX-15
ETX-15
ETX-30
ETX-30
ETX-30
ETX-30
ETX-30
ETX-30
ETX-30
ETX-60
ETX-60
ETSX-30
ETSX-30
ETSX-30
ETSX-30
ETSX-40
ETSX-40
ETSX-60
ETSX-60
ETSX-60
ETSX-90
ETSX-90
ETSX-110
ETSX-110
ETX-15
ETX-15
ETX-30
ETX-30
ETX-30
ETX-30
ETX-30
ETX-30
ETX-60
ETX-60
ETX-60
ETX-60
ETX-60
ETSX-30
ETSX-40
ETSX-40
ETSX-60
ETSX-60
ETSX-90
ETSX-90
ETSX-110
ETSX-110
ETSX-110
ETSX-110
ETSX-160
ETSX-160
ETX-15
ETX-15
ETX-30
ETX-30
ETX-60
ETX-60
ETX-60
ETX-60
ETX-60
ETX-60
ETX-90
ETX-90
ETX-90
ETSX-40
ETSX-40
ETSX-60
ETSX-90
ETSX-90
ETSX-90
ETSX-90
ETSX-110
ETSX-110
ETSX-110
ETSX-160
ETSX-160
ETSX-110 (2)
ETX-15
ETX-15
ETX-30
ETX-30
ETX-60
ETX-60
ETX-60
ETX-60
ETX-60
ETX-90
ETX-90
ETX-90
ETX-90
ETSX-30
ETSX-30
ETSX-30
ETSX-40
ETSX-40
ETSX-60
ETSX-60
ETSX-90
ETSX-90
ETSX-90
ETSX-90
ETSX-110
ETSX-110
Note: These recommendations are based on the average water volume of typical closed systems.
Fill pressure 12psi, relief valve set pressure of 30psi and system temperature of 200˚F.
Diameter
Diameter
Height
Height
ETSX
ETX
Model
ETX-15
ETX-30
ETX-60
ETX-90
ETSX-30
ETSX-40
ETSX-60
ETSX-90
ETSX-110
ETSX-160
Connection
Size (DN)
Tank
Volume
Accept.
Volume
Diameter
Height
Weight
gal.
liters
gal.
liter
in
mm.
in
mm.
in
mm.
lbs.
kgs.
/ " MNPT
/ " MNPT
1/2" MNPT
3/4" MNPT
1" FNPT
1" FNPT
1" FNPT
11/4" FNPT
11/4" FNPT
11/4" FNPT
15
15
15
20
25
25
25
32
32
32
2.1
4.5
6.0
15.0
15.0
20.0
33.0
44.0
62.0
81.0
7.9
17.1
22.8
57.0
57.0
76.0
125.4
167.2
235.6
307.8
1.0
2.5
3.0
6.0
6.0
8.0
13.3
17.7
24.9
32.6
3.8
9.5
11.4
22.8
22.8
30.4
50.5
67.3
94.6
123.9
8
11
113/8
16
16
16
16
21
21
21
203
279
290
406
406
406
406
533
533
533
121/2
14
173/16
2013/16
2111/16
2813/16
4213/16
363/16
477/8
62
318
356
437
528
551
732
1087
919
1217
1575
0.5
10.0
11.5
28.0
32.0
39.0
57.0
72.0
112.0
123.0
0.23
4.54
5.22
12.70
14.51
17.69
28.85
32.66
50.80
55.79
1 2
1 2
17
NON-POTABLE — ASME
Series ETA
ASME Pressurized Expansion Tanks
for Heating and Cooling Systems
Models ETA 15 – ETA 240
Series ETA tanks are ASME fixed bladder type precharged expansion tanks. They are designed to absorb
the expansion forces and control the pressure in heating
and cooling systems. The water is contained in the
heavy duty bladder preventing tank corrosion and
waterlogging problems.
Features
• ASME Section VIII Construction
• Heavy duty butyl bladder
• Precharged to 12psi (82 kpa) (Field Adjustable)
• Shell: Carbon steel
• Bladder: Heavy duty butyl
• Primer coated exterior
Lift
Ring
Specifications
Furnish and install as shown on plans a Watts Model ETA
____ gallon ____ " diameter x ____" (high) pre-charged
steel expansion tank with a fixed butyl bladder. The tank
shall have a top NPT system connection and a .302" – 32"
(7.6 – 812.8mm) charging valve connection (standard tire
valve) to facilitate the on-site charging of the tank to meet
system requirements. The tank must be constructed in
accordance with Section VIII of the ASME Boiler and
Pressure Vessel Code.
Charging
Valve
System
Connection
System
Connection
O.A.H.
Dia.
Maximum Design Pressure:
ETA 15 – ETA 60: 150psi (10 bars)
ETA 80 – ETA 240: 125psi (8.5 bars)
Precharged to 12psi (82 kPa)
Maximum Design Temperature: 240°F (115°C)
O.A.H.
Dia.
For additional information, request literature ES-ETA.
C
ETA 40 – ETA 240
ETA 15 and ETA 20
Model
ETA 15
ETA 20
ETA 40
ETA 60
ETA 80
ETA 100
ETA 120
ETA 144
ETA 180
ETA 200
ETA 240
18
System
Connection
Size (DN)
Tank
Volume
Charging
Valve
Acceptance
Volume
Max.
Operating
Pressure
Dimensions (approx.)
Dia.
Weight
Height
C
in.
mm
Gals.
Liters
Gals.
Liters
psig
bars
in.
mm
in.
mm
in.
mm
lbs.
kgs.
34
20
20
25
25
25
25
40
40
40
40
40
7.8
10.9
25
35
45
60
70
80
90
115
140
29.6
41.4
95
133
171
228
266
304
342
437
532
2.5
2.5
10
10
21
21
48
48
48
48
52
9.5
9.5
38
38
80
80
182.4
182.4
182.4
182.4
197.6
150
150
150
150
125
125
125
125
125
125
125
10
10
10
10
8.6
8.6
8.6
8.6
8.6
8.6
8.6
12
12
16
16
20
20
24
24
24
24
24
305
305
406
406
508
508
610
610
610
610
610
19
26
33
45
38
49
46
49
52
66
78
483
660
838
1143
968
1245
1168
1245
1321
1676
1981
–
–
12
12
18
18
22
22
22
22
22
–
–
305
305
457
457
559
559
559
559
559
42
52
84
97
148
175
259
268
283
325
362
19
24
38
44
67
79
117
122
128
147
164
⁄
3⁄ 4
1
1
1
1
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
NON-POTABLE — ASME
Series ET-RA
ASME Pressurized Expansion Tanks for
Heating and Cooling Systems
D
Lift
Ring
E
Models ET-RA 35 – ET-RA 2000
Series ET-RA tanks are ASME removable bladder type
pre-charged expansion tanks. They are designed to
absorb the expansion forces and control the pressure in
heating and cooling systems. The water is contained in
the heavy duty bladder, preventing tank corrosion and
waterlogging problems.
A
B
C
Features
F
G
• ASME Section VIII Code Construction
ET-RA 85 – ET-RA 800
• Removable butyl bladder
• Precharged to 12psi (82 kpa) (Field Adjustable)
• Shell: Carbon steel
• Bladder: Heavy duty butyl
Lift Ring
• Primer coated exterior
C
Specifications
Furnish and install as shown on plans a Watts Model ET-RA
____ gallon ____ " diameter x ____" (high) pre-charged steel
expansion tank with a heavy duty butyl rubber bladder. The
tank shall have NPT system connections and a .302" - 32"
(7.6 – 812mm) charging valve connection (standard tire valve)
to facilitate the on-site charging of the tank to meet system requirements. The tank must be constructed in accordance with
Section VIII of the ASME Boiler and Pressure Vessel Code.
System
Connection
C
Charging
Valve
E
2"
B
A
B
1" NPT
w/Plug
Lift
Ring
E
Maximum Design Pressure: 125psi* (8.5 bars)
Maximum Design Temperature: 240°F (115°C)
Precharged to 12psi (83 kPa)
*Models with 200 and 250psi ratings are available.
ET-RA 35 and ET-RA 50
Drain
D
A
ET-RA 1000 – ET-RA 2000
For additional information, request literature ES-ET-RA.
Model
ET-RA 35
ET-RA 50
ET-RA 85
ET-RA 130
ET-RA 200
ET-RA 300
ET-RA 400
ET-RA 500
ET-RA 600
ET-RA 800
ET-RA 1000
ET-RA 1200
ET-RA 1400
ET-RA 1600
ET-RA 2000
Tank
Volume
Tank
A (DN)
B
C
D
Dimensions (approx.)
E
Gals.
Liters
in.
mm
in.
mm
in.
mm
in.
mm
10
13
23
35
53
79
106
132
158
211
264
317
370
422
528
38
49.4
87.4
133
201.4
300
402.8
501.6
600.4
801.8
1003.2
1204.6
1406
1603.6
2006.4
12
14
16
20
24
24
30
30
30
36
36
36
36
48
48
305
356
400
508
610
610
750
750
750
900
900
900
900
1200
1200
25
25
37
37
43
55
49
57
65
63
74
86
99
72
85
635
635
940
940
1092
1397
1245
1448
1651
1600
1880
2184
2515
1829
2159
34
19
19
25
25
38
38
38
38
38
38
38
38
38
38
38
–
–
1⁄ 2
1⁄ 2
1⁄ 2
3⁄ 4
3⁄ 4
3⁄ 4
3⁄ 4
3⁄ 4
3⁄ 4
3⁄ 4
3⁄ 4
3⁄ 4
3⁄ 4
–
–
13
13
13
19
19
19
19
19
19
19
19
19
19
⁄
3⁄ 4
1
1
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
1 1⁄ 2
.302"
-32NC
–
–
.302"
-32NC
–
–
–
–
–
–
.302"
-32NC
–
Weight
F
G
in.
mm
in.
mm
lbs.
kgs.
–
–
12
16
20
20
24
24
24
30
–
–
–
–
–
–
–
305
406
508
508
610
610
610
762
–
–
–
–
–
–
–
5 1⁄ 2
5 1⁄ 2
5 1⁄ 4
5 1⁄ 4
5 1⁄ 4
5 1⁄ 4
5 1⁄ 4
5 1⁄ 4
–
–
–
–
–
–
–
140
140
133
133
133
133
133
133
–
–
–
–
–
40
50
90
125
210
225
300
335
360
475
710
720
875
1100
1280
18
23
41
57
95
102
136
152
163
215
322
327
397
499
581
Note: Models ET-RA 85 – ET-RA 800 have both top and bottom connections (C and D) to access the bladder.
19
NOTES
20
NOTES
21
HEADQUARTERS: Watts Regulator Company
815 Chestnut St., North Andover, MA 01845-6098 U.S.A.
978 688-1811
978 794-1848
North
East
Edwards, Platt & Deely, Inc.
Edwards, Platt & Deely, Inc.
W. P. Haney Co., Inc.
271 Royal Ave., Hawthorne, NJ 07506
368 Wyandanch Ave., North Babylon, NY 11703
51 Norfolk Ave., South Easton, MA 02375
973 427-2898
631 253-0600
508 238-2030
973 427-4246
631 253-0303
508 238-8353
Mid
Atlantic
J. B. O’Connor Company, Inc.
RMI
The Joyce Agency, Inc.
Vernon Bitzer Associates, Inc.
WMS Sales, Inc. (Main office)
P.O. Box 12927, Pittsburgh, PA 15241
Glenfield Bus. Ctr., 2535 Mechanicsville Tpk., Richmond, VA 23223
8442 Alban Rd., Springfield, VA 22150
980 Thomas Drive, Warminster, PA 18974
9580 County Rd., Clarence Center, NY 14032
724 745-5300
804 643-7355
703 866-3111
215 443-7500
716 741-9575
724 745-7420
804 643-7380
703 866-2332
215 443-7573
716 741-4810
South
East
Billingsley & Associates, Inc.
Billingsley & Associates, Inc.
Francisco J. Ortiz & Co., Inc.
Mid-America Marketing, Inc.
Mid-America Marketing, Inc.
Mid-America Marketing, Inc.
Smith & Stevenson Co., Inc.
Spotswood Associates, Inc.
Target Marketing Enterprises, Inc.
2728 Crestview Ave., Kenner, LA 70062-4829
478 Cheyenne Lane, Madison, MS 39110
Charlyn Industrial Pk., Road 190 KM1.9 - Lot #8, Carolina, Puerto Rico 00983
203 Industrial Drive, Birmingham, AL 35211
1364 Foster Avenue, Nashville, TN 37210
5466 Old Hwy. 78, Memphis, TN 38118
4935 Chastain Ave., Charlotte, NC 28217
6235 Atlantic Blvd., Norcross, GA 30071
118 West Grant St., Building M, Orlando, FL 32806
504 602-8100
601 856-7565
787 769-0085
205 879-3469
615 259-9944
901 795-0045
704 525-3388
770 447-1227
407 245-7838
504 602-8106
601 856-8390
787 750-5120
205 870-5027
615 259-5111
901 795-0394
704 525-6749
770 263-6899
407 245-7833
North
Central
Aspinall Associates, Inc.
Dave Watson Associates
Disney McLane & Associates
BWA Company
Mid-Continent Marketing Services Ltd.
Soderholm & Associates, Inc.
Stickler & Associates
6840 Hillsdale Court, Indianapolis, IN 46250
1325 West Beecher, Adrian, MI 49221
428 McGregor Ave., Cincinnati, OH 45206
17610 S. Waterloo Rd., Cleveland, OH 44119
1724 Armitage Ct., Addison, IL 60101
7150 143rd Ave. N.W., Anoka, MN 55303
333 North 121 St., Milwaukee, WI 53226
317 849-5757
517 263-8988
800 542-1682
216 486-1010
630 953-1211
763 427-9635
414 771-0400
317 845-7967
517 263-2328
877 476-1682
216 486-2860
630 953-1067
763 427-5665
414 771-3607
South
Central
Fax #
Hugh M. Cunningham, Inc.
Mack McClain & Associates
Mack McClain & Associates, Inc.
Mack McClain & Associates, Inc.
OK! Sales, Inc.
Phoenix Marketing, Ltd.
13755 Benchmark, Dallas, TX 75234
11132 South Towne Square, Suite 202, St. Louis, MO 63123
1450 NE 69th Place, Ste. 56 Ankeny, IA 50021
15090 West 116th St., Olathe, KS 66062
2200 Blue Creek Dr., Norman, OK 73026
2416 Candelaria N.E., Albuquerque, NM 87107
972 888-3808 972 888-3838
314 894-8188 314 894-8388
515 288-0184 515 288-5049
913 339-6677 913 339-9518
405 360-6161 405 360-0092
505 883-7100 505 883-7101
Western
Telephone #
Delco Sales, Inc.
Delco Sales, Inc.
Fanning & Associates, Inc.
Hollabaugh Brothers & Associates
Hollabaugh Brothers & Associates
P I R Sales, Inc.
Preferred Sales
R. E. Fitzpatrick Sales, Inc.
1930 Raymer Ave., Fullerton, CA 92833
111 Sand Island Access Rd., Unit I-10, Honolulu, HI 96819
6765 Franklin St., Denver, CO 80229-7111
6915 South 194th St., Kent, WA 98032
3028 S.E. 17th Ave., Portland, OR 97202
3050 North San Marcos Place, Chandler, AZ 85225
31177 Wiegman Road, Hayward, CA 94544
4109 West Nike Dr. (8250 South), West Jordan, UT 84088
714 888-2444 714 888-2448
808 842-7900 808 842-9625
303 289-4191 303 286-9069
253 867-5040 253 867-5055
503 238-0313 503 235-2824
480 892-6000 480 892-6096
510 487-9755 510 476-1595
801 282-0700 801 282-0600
Canada
For Technical Assistance Call Your Authorized Watts Agent.
Watts Industries (Canada) Inc.
(Watts Regulator Co. Division)
Con-Cur West Marketing, Inc.
D.C. Sales, Ltd.
D.C. Sales, Ltd.
GTA Sales Team.
Hydro-Mechanical Sales, Ltd.
Hydro-Mechanical Sales, Ltd.
Hydro-Mechanical Sales, Ltd.
Le Groupe B.G.T., Inc.
Le Groupe B.G.T., Inc.
Mar-Win Agencies, Ltd.
Northern Mechanical Sales
Palser Enterprises, Ltd.
RAM Mechanical Marketing
RAM Mechanical Marketing
Walmar Mechanical Sales
5435 North Service Road, Burlington, Ontario L7L 5H7
#109-42 Fawcett Rd., Coquitlam, British Columbia V3K 6X9
10-6130 4th St. S.E., Calgary, Alberta T2H 2A6
11420 142 Street, Edmonton, Alberta T5M 1V1
Greater Toronto Area
3700 Joseph Howe Dr., Ste. 1 Halifax, Nova Scotia B3L 4H7
297 Collishaw St., Ste. 7 (shipping) Moncton, New Brunswick E1C 9R2
85 Tolt Rd., St. Phillips, Newfoundland A1B 3M7
23 du Buisson, Pont Rouge, Quebec G3H 1X9
86 des Enterprises #208, Boisbriand, Quebec J7G 2T3
1123 Empress St., Winnipeg, Manitoba R3E 3H1
P.O. Box 280 (mailing) 163 Pine St. (shipping), Garson, Ontario P3L 1S6
1885 Blue Heron Dr., #4, London, Ontario N6H 5L9
1401 St. John St., Regina, Saskatchewan S4R 1S5
510 Ave M South, Saskatoon, Saskatchewan S7M 2K9
24 Gurdwara Rd., Nepean, Ontario K2E 8B5
905 332-4090
604 540-5088
403 253-6808
780 496-9495
888 208-8927
902 443-2274
506 859-1107
709 895-0090
418 657-2800
450 434-9010
204 775-8194
705 693-2715
519 471-9382
306 525-1986
306 244-6622
613 225-9774
905 332-7068
604 540-5084
403 259-8331
780 496-9621
888 479-2887
902 443-2275
506 859-2424
709 895-0091
418 657-2700
450 434-9848
204 786-8016
705 693-4394
519 471-1049
306 525-0809
306 244-0807
613 225-0673
EXPORT Hdqtrs.: Watts Regulator Co.
815 Chestnut St., North Andover, MA 01845-6098 U.S.A.
978 688-1811
978 794-1848
0408
Watts USA website: www.wattsreg.com
Watts Canada website: www.wattscanada.ca
PG-ThermExpansion 0414
© Watts Regulator Co., 1998
Printed in U.S.A.