Step 1

At the lowest point of the pond, stub up a 3 inch bottom
drain and cap it off. If you are using the Advantage Bottom
Drain Cover with built in Air Diffuser, you will need to
install an air line. To do this, place a 3/4 inch PVC pipe
for air exactly 12 inches away from the edge of the bottom
drain pipe. Clean out dirt from around pipes for cement.
Cap the air line and then pressure test all lines.

Step 2

Pre assemble both the 3 inch bulkhead flange, as well as the
1 1/2 flange by screwing the top flanges onto their bases.
Do not tighten with a drill gun. Always only hand tighten
all plastic bulkheads to prevent stripping the plastic
threads. After pipes have been pressure tested, cut both
pipes and cement on both bulkhead flanges. Flanges should
be installed approximately 1/2 inch below the rim of the
dirt hole.

Step 3

When cementing both bulkheads on to the pipes, align screw
in a straight line.This will make locating the screw holes
easier to find later when screwing the top plate down
through the liner.

Step 4

Add cement to hole around drain. Carefully float cement
up to top of bulkhead flanges. Be careful not to get
cement into screw slots. The final contour of the cement
should be even with the top of the bulkheads and flat
across the whole cemented area.

Step 5

After the cement dries, use a screw driver to remove the
cement right up against both of the bulkheads. This should
allow a smooth transition of the rubber liner from the
cement surface to under the flange covers on the bulkheads.

Step 6

Remove top flanges and sweep area clean.

Step 7

Place liner in pond. Make sure liner is properly aligned so
that the liner extends over all the outer edges of the pond.
Then cut a 2 inch hole in the liner over the bottom drain
opening only. Use a small paint brush to reach through the
hole in the liner and brush away any debris that might have
collected on top of the bulkhead flange.

Step 8

Place a bead of 100% silicone caulk on the face of the flange
under the liner and then gently press the liner down against
the flange.

Step 9

Install the top flange in place over the bottom drain hole
by aligning the flange with the center opening of the
bulkhead. If you followed step 3 when cementing on bulkheads,
align the holes in the top flange in a straight line with the
air line pipe opening. There is no need to place silicone on
the surface of the top flange cover when installing it. Gently
install the self tapping screws with a screw gun but do not
tighten screws with the screw gun.

Step 10

After all screws are installed in the flange then hand tighten
each screw.

Step 11

Cut liner away from inside bulkhead.

Step 12

Repeat steps 7 through 11 for the smaller air supply line.
Notice, in step 7 cut a 1 inch hole in the liner instead of
a 2 inch hole

Step 13

After both bulkheads are installed, screw the 1 1/2 inch to
1/2 inch reducer bushing into the air supply bulkhead. Then
screw the 1/2 inch black street elbow into the reducer bushing.
Make sure to Teflon tape both joints. Both these fittings come
with the Advantage Air Supply Bulkhead Assembly. Next, cut the
black flex hose, included in the kit, to the right length to
allow the bottom drain to be installed directly over the bottom
drain opening. Finally, use PVC cement to glue both ends of
the black flex hose in place between the air supply opening and
the bottom drain cover pipe.

Step 14

Once the PVC cement dries, if debris ever gets caught under the
drain cover, you will have the ability to lift the drain cover
up or slide it to the side, with a pool net to remove the debris.

This is a real advantage over conventional pond drain covers.
With most other drain covers, if debris collects under or around
the cover, you would need to get into the pond to physically
remove and then replace the drain cover after removing any debris.