Fiberglass Tank & Pipe Institute
Presentation
Double-Wall Tank Sump Session
2017 ASTSWMO May Meeting
(May 23-25, 2017)
Round DW Collars
 42” and 48”
round collars
 Accepts round
base of sumps for
rotation and
precise alignment
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Polygon Sump Base
 Bottom of polygon
sump base
transitions to round
 Allows for precise
adjustment of base
so flat panels align
with entry fittings
and pipe runs
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8-Sided Polygon Sump Bases
 Both the 42” and
48” diameter
sumps are 8-sided
 Allows for proper
alignment of pipe
and entry fitting
for 90 and 45
degree couplings
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Drain/Test Fitting
 Threaded fitting
and plug
 Designed for annual
testing and
demonstrating
communication
between tank collar
and sump
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2-Piece Design
 Bottom section of
polygon base is 2’ high
 Avoids confined
space entry
 Makes installing pipe
penetrations easier
 Permits immediate
pre-testing of entry
penetrations
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Joint Options
Adhesive Channels
Layup
Sumps
are
Joint
 connected
Sumps arethrough
factory
installed
connected
through
adhesive
channels
field installed
layup
with
withsupplied
supplied kit
adhesive kit
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Watertight Lid
 Manufactured out of
fiberglass
 No mechanical
fasteners
 Optional inspection
port
 Watertight gasket
design
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Reservoir
 Integral fiberglass
reservoir that cannot
be easily damaged
during routine
maintenance
 PVC threaded opening
 Convenient access to
sensor
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Palletized Sumps
 Sumps may be
palletized for
transportation and
jobsite storage
 Prevents damage in
transit or on-site
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Installation Material & Training
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ASSEMBLY
INSTRUCTIONS
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Assembly Instructions
When
Dry
fitusing
all
sump
components
If
IfAdhesive
required,
Joints
trim
sump
– Sand
body
theextension
surface
that
using
will
a
Adhesive
Channel:

the
drain
plug
in
the
collar
is
removed,
be
Field cuts must
withinthe
±¼”mating
of square
Contractor
mustbe
re-sand
surfaces
carbide
contact
tipped
theany
adhesive
blade
or
achanges
masonry
blade
sure
Determine
length
to
insure
the
reducer
fitting
remains
intact
inwith
the
before
Insert
channel
mesh
material
provided
adhesive
or
layup
application
 Gaps between two joints greater than ¼”
minimum
required
clearance
between
sump
bushing.
only
the
¼”
drain
plug.
 The
collar
Layup
sump
Joints
body
– Remove
extension
Sand
a minimum
is only
component
of 4”
onto
each
adhesive
kit
360°
around
each
joint
must be
with a maximum
½”
 Remove
anycovered
rocks, and/or
debris fromwidth
adhesive
topcan
and
that
part
where
beconcrete
trimmed
the layup will be applied
tape
channel
 Confirm
enclosure
topare
and
reservoir
are level
 Ensure
mating
surfaces
free
of contaminants
Maintain
minimum
of 4”
on theuntil
sumpwhite
bodyin
Sand
and clean
mating
surfaces
and
dry sump reservoir and drain fitting are

Confirm
extension to complete interior joint
color
located
thecloth
same side to facilitate
 Wipe
withon
clean
testing
 Docommunication
not use oil-based
solvents, soap, or water to
clean surfaces
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ADHESIVE & LAYUP
INSTRUCTIONS
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Adhesive & Layup Instructions
 Check date on
Temperature Considerations:
adhesive/layup
container
 After mixing adhesive and hardener, you
no more than 20 minutes to
 Notewill
the have
following
datescomplete
on the the application before the resin
begins toTank
harden
Double-Wall
Sump
Installation method for supplemental
 Recommended
Checklist:
heat is to transform air to the tank sump
 Date
the kit
was ignition sources away
while
keeping
assembled
 Date the kit was used
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Adhesive Joint
 With the tank sump components in place, make
two consecutive 360° passes around the tank
sump filling the adhesive channel evenly using
all adhesive
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Layup Joints

two
joints greater
¼” must
 Gaps
Applybetween
3 layers of
fiberglass
layup,than
saturated
withbe
covered
with
maximum
width ½”
tape toon
prevent
resin, 360°
around
tank sump,
centered
joint
resin from running into joint
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ASSEMBLED TANK
SUMPS
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Assembled Tank Sumps
 All piping and electrical penetrations
(supplied by others) must seal the tank sump
annular space
 Do not connect the tank sump annular space to
any other annular space
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POST ASSEMBLY TEST
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Post Assembly Test
Prior to backfilling:
 The annular space may be pressure tested to a
maximum of 3 psig during the installation
 After pressurizing, apply a soap and water
solution to the entire surface area on the inside
and outside of the tank sump
 Carefully inspect for leaks as indicated by
continuous formation of bubbles
 Maintain test pressure and continue inspection
for 30 minutes. Then release pressure
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ANNULAR SPACE
MONITORING
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Annular Space Monitoring
Hydrostatically Monitored Annular Space
 Monitoring solutions available
 Brine – Calcium Chloride Solution
 Propylene Glycol Solution
Vacuum Monitored Annular Space
 Vacuum monitoring may be used utilizing the
factory installed fitting
 Maximum continuous vacuum level shall not
exceed 5 psig (10.2”Hg)
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Annular Space Monitoring
 Fill the tank sump with the required number of
gallons of monitoring fluid
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Thank you
Questions ?
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