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Section 2: Media Filter (Pump Discharge) Installation Instructions
1.
Excavate a hole for the media filter, large enough to build the liner support
walls. NOTE: Support walls should extend a minimum of 4" above the original
grade to allow surface water to be diverted away from the media filter.
2.
Excavate a 24" diameter x 6" deep hole with sloping walls in the center of
the media filter excavation (see Figure 4 on page 8).
3.
Excavate a trench for the supply piping and for the drain piping to the
media filter.
4.
Smooth, rake, compact and level the bottom of the excavation as required.
If additional leveling material is required, use the media/gravel material.
5.
Erect the support walls of approved material and size. Pressure treated
2x10's or concrete are recommended.
6.
Using a 2" hole saw, locate and cut a hole in the support wall for the
supply pipe penetration. The hole should be horizontally centered on the
wall being penetrated and the edge should be 1-1/2" above the 24" of filter
media (see # 6 on page 6 and Figure 4 on page 8).
7.
Using a 2" hole saw, locate and cut a hole in the support wall for the
discharge pipe penetration. This should be on the opposite wall from
the first hole. The hole should be horizontally centered on the wall being
penetrated and the edge should be 1½" above the 24" of filter media (see
# 6 on page 6 and Figure 4 on page 8).
8.
Using a 1-1/2" hole saw, locate and cut a hole in the support wall for the
prewired conduit to penetrate. The hole should be 12" to the left or right
of the 2" supply pipe hole and the edge should be 3" above the 24" of filter
media.
9.
Install the protective mat.
10.
Install the liner, making bottom and corners smooth. Excess should be laid
over the top and tucked down the outside of support walls.
11.
Using a utility knife, cut a hole through the liner to match the two 2" and
one 1-1/2" holes cut in the support walls.
12.
Install the media filter pump riser in the 24" x 6" central depression. The
two cutouts should face the support walls that have the holes cut in
them.
13.
Install 6" of the appropriate under drain media (3/4" to 1-1/2" gravel typical)
in the 24" x 6" depression around the riser for support.
14.
Cut the 4" drainpipe to the required lengths. The pipe should protrude
into the riser 1" and extend out toward the support walls as close as
possible.
15.
Place the open end of the drainpipe into the riser.
16.
Attach the 4" end caps or screened vent risers to one end of each
drainpipe section.
17.
Install 8" of the appropriate under drain media (3/4" to 1-1/2" gravel typical).
While filling, be sure to position drainpipe properly. Backfill 8" with the
excavated material outside the frame as you fill inside the frame.
18.
Clean the area on the liner around the drain supply penetration holes with
Firestone Quick Prime Plus. Apply the primer with a scrubber pad or clean
cotton rag. Thoroughly scrub the bonding area three times with primer.
Allow the primer to dry for 10 minutes. Remove the protective paper from
seal boot adhesive. Do not touch the adhesive surface. Place boot adhesive
against cleaned and smoothed liner surface. Press the boot with a roller
or acceptable tool to ensure bubbles and wrinkles are removed. DO NOT
PEEL BOOT BACK TO TEST SEAL.
19.
Slide the 1-1/4" penetration pipe in the inlet seal boot. The seal boot may
need to be trimmed to the appropriate diameter. The boot should fit snug
with no wrinkles.
20.
Place the hose clamp around the boot onto 1-1/4" penetration pipe and
tighten. Apply a bead of Firestone lap sealant caulk where the pipe boot
meets the pipe.
21.
Slide the 1-1/4" penetration pipe into the discharge seal boot. The seal
boot may need trimmed to the appropriate diameter. The boot should fit
snug with no wrinkles.
22.
Place the hose clamp around the boot onto 1-1/4" penetration pipe and
tighten. Apply a bead of Firestone lap sealant caulk where the pipe boot
meets the pipe.
23.
Remove the fitting from the end of the prewired conduit with the 18" leads
and feed it through the 1-1/4" hole in the support wall up to the pump
riser.
24.
Slide the prewired conduit through the seal boot. The seal boot may need
trimmed to the appropriate diameter. The boot should fit snug with no
wrinkles.
25.
Reattach the fitting onto the end of the conduit.
26.
Place the hose clamp around the boot onto prewired conduit and tighten.
Apply a bead of Firestone lap sealant caulk where the pipe boot meets
the pipe.
27.
Lay the prewired conduit back over the support wall temporarily.
28.
Assemble the pump, discharge pipe, vertical float switch and the alarm
float.
29.
Using a 1-3/4" hole saw, locate and cut a hole in the pump riser for the
pump discharge. The hole should be on the same side as the discharge
hole cut in the side of the support wall and the edge should be 1-1/2"
above the 24" of filter media (see # 6 on page 5 and Figure 4 on page 7).
30.
Place the pump, discharge pipe and float assembly down into the pump
riser.
31.
Using a 2-3/8" hole saw, locate and cut a hole in the pump riser for the
J-Box. The hole should be on the same side as the prewired conduit hole
cut in the side of the support wall and the edge should be 3" above the 24"
of filter media, or 28" to the center line of the 2" hole from the underdrain
media (see # 6 on page 5).
32.
Install 24" of the specified filtering media. Backfill 24" with the excavated
material outside the frame as you fill the inside the frame.
33.
Insert the 1-1/4" discharge pipe section through the seal from the inside
of the riser and attach it to the elbow of the discharge assembly attached
to the pump.
34.
Attach the discharge pipe to the discharge penetration pipe.
35.
Install the J-Box and conduit into the pump riser.
36.
Install 1-1/2" of the appropriate overlay media (3/4" to 1-1/2" gravel
typical).
37.
Place manifold and distribution piping on overlay media. Remove the
protector plugs from the manifold and the distribution pipes as installing.
38.
Attach the manifold to the supply penetration pipe.
39.
Attach the distribution pipes to the manifold ensuring the elbow end is
vertically plumb.
40.
Snap the orifice shields over the holes in the bottom of the distribution pipes.
41.
Slide the risers over the clean outs (90° sweep elbow). Place appropriate
overlay media (3/4" to 1-1/2" gravel typical) around risers to hold
them in place.
42.
Install 3" to 4-1/2" of the appropriate overlay media (3/4" to 1-1/2" gravel
typical). While filling, be sure the discharge pipes stay positioned.
43.
Install a protective buried fence (optional).
44.
Install 3" of the appropriate overlay media (3/4" to 1-1/2" gravel typical). A
maximum of 8" of overlay media is allowed above the discharge pipes.
45.
Make final supply and drain connections if this has not already been
done.
46.
Finish by backfilling and landscaping. Be sure there is a 4" (minimum)
berm surrounding the media filter to ensure that no surface water enters
the media filter system.
47.
Extend 1-1/4" discharge pipe from media filter pump to the pressure flow
splitter. The splitter MUST be located at the highest point to have gravity
flow to drain field and dose tank. If pressure is required at the drain field,
consult factory.
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