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E. Removal and Replacement of the Inlet
and Outlet Bulkhead Fittings
CAUTION
This procedure must be followed exactly. Failure to
follow the procedure exactly can result in system
leaks or property damage.
1. Use a brush to clear all sand from the exposed
fitting threads and rinse with water. Removal of the
nuts will be difficult if there is sand in the fitting
threads.
Note: Make sure that the exposed threads are free of
sand before continuing with the next step.
2. Remove the nuts from the bulkhead fittings.
Note: Do not rotate the bulkhead fittings. Use the flats
on the bulkhead fitting to hold it from rotating
while the nut on the inside of the tank is re-
moved.
3. Thoroughly clean any parts that will be reused.
4. Reassemble fittings taking care that the curved
surfaces of the spacers are towards the tank. Ensure
that the wide spacer on the outside of the tank is
on the top (outlet) port, and the narrow spacer is
placed on the bottom (inlet) port. See Figure 5.
5. When tightening the nuts on the bulkhead fitting
assemblies, DO NOT rotate the bulkhead fittings.
Orient the bulkhead fittings such that the wrench
flat with the part number on it faces up. This will
put the keyway in the bulkhead fitting at the top
and will keep the curvature of the tank. Use the
wrench flats on the bulkhead fitting to hold it in this
position and do not rotate the bulkhead fitting while
the nuts are being tightened inside the tank.
F. Remove and Replace the Drain Fitting
1.
Remove the drain fitting nut and o-ring from the
outside of the tank.
2. Thoroughly rinse and wipe clean the inside and
outside surfaces of the tank around the drain fitting
hole.
3. Reassemble the drain fitting as shown in Figure 6.
Before installing the o-ring at the drain fitting nut,
brush soapy water (mild detergent or bar soap and
water) onto the o-ring. Tighten the drain fitting
nut.
4. Clean and reinstall the drain screen assembly and
drain cap.
G. Reassemble the Internal Piping
Assemblies Inside the Filter
Note: All parts must be rinsed and flushed clean of
sand before assembly, inside and out. If old
laterals are being reused, brush any filter media
from the slots.
1. Make sure the keyways in the inlet and outlet
fittings are dry. Place a dab of silicone sealant
(about ¼ inch diameter) in each of the keyways
against the nut of both the inlet fitting and outlet
fitting (silicone sealant is not provided in the kit).
2. Thread the inlet pipe assembly (this is the assembly
with the shorter piece of pipe with four (4) holes
drilled and a female adapter on the opposite end)
onto the inlet bulkhead fitting hand tight only.
Adjust the pipe so a screw hole is facing up. Refer
to Figure 4.
3. While holding the pipe of the hub sub assembly,
place the hub inside the top of the tank and
thread the laterals into the hub. Ensure laterals
are threaded fully into the hub and are hand tight.
Drain Inner Seal
Drain Fitting
Tank
Base
O-Ring
Drain Nut Fitting
Figure 6. Drain Fitting
Inner Spacer
(Curved Side
Towards the Tank)
Nut
Slip Ring
Bulkhead
Fitting
Narrow Spacer
on Inlet Fitting
(Curved Side
Towards Tank)
Wide Spacer on
Outlet Fitting
(Curved Side
Towards Tank)
Flat
Gasket
O-Ring
Figure 5. Inlet and Outlet Fitting Parts
