Installation
3
• PVC Union sized to match the sink drain size or pump
inlet size (1-1/2" NPT).
• PVC Union sized to match the pump discharge size (1"
NPT or 1" Slip).
• Teflon tape
• 1-1/2" NPT close nipple.
PUMP INSTALLATION
Mount the pump
NOTICE:
DO NOT use plumber’s pipe threading com-
pound (“pipe dope”) on plastic pipe; it can damage the
plastic, causing leaks and piping failure and voiding the
warranty.
1. Place the sink in its final location.
2. Remove any existing drain fittings back to the tail
piece (Figure 1). Make sure the existing tail piece does
not leak.
NOTICE:
If the sink-drain tail piece is not 1-1/2" NPT,
you will have to adapt (bushings, reducers, etc.). In
this case, wrap all joints with teflon tape before mak-
ing connections.
3. Wrap the threads of the tail piece with 1 to 1-1/2 turns
of teflon tape. Thread the 1-1/2" NPT union (purchase
separately) onto the sink-drain tail piece (or onto the
adapter, if necessary).
4. Wrap the threads of the close nipple with 1 to 1-1/2
turns of teflon tape and install it in the pump inlet.
5. Install the lower half of the 1-1/2" NPT union on the
close nipple from Step 4.
6. Position the pump under the drain pipe and connect
the union to hang the pump on the drain pipe.
NOTICE:
Put a temporary support under the pump (to
relieve the strain on the sink drain piping) while you
measure and cut the discharge piping.
7. Wrap the pump discharge with 1-1/2 to 2 turns of
teflon tape and thread the NPT-to-Slip adapter onto it.
NOTICE:
Tighten this only enough to prevent leaking.
Over-tightening can crack the plastic.
8. Install the discharge piping as shown in Figure 2.
NOTICE:
Install the check valve in a vertical position if
possible. Be sure the flow arrow points AWAY from the
pump and be sure to install it with “this side up” (hori-
zontal) or “this end up” (vertical) correctly positioned.
Fire and explosion hazard.
Be sure to
follow cement manufacturer’s instructions when using
PVC cement. Do not use near fire or open flame.
9. Install the discharge shut-off valve at a convenient
height.
10. Connect the discharge piping to the building drain.
Plug in the Pump
AFTER the pump is completely installed, plug the pump
into a GFCI-protected, properly grounded outlet.
Adjusting The Flow
The drain pump can pump up to 23 gallons per minute
(GPM). Normal sink drains allow only 5 to 6 GPM to
flow. Adjust the discharge shut-off/flow balancing valve as
follows so that the pump does not cycle on and off when
the faucets are on full.
1. Run water into the sink. The pump will start when it
detects water.
2. Check for leaks. If leaks are found, unplug the pump
and fix them before proceeding.
3. Put a stopper in the drain and allow the sink to fill up
a few inches.
4. Open the discharge shut-off valve and remove the
stopper to drain the sink.
5. The pump will start. Adjust the discharge shut-off/flow
balancing valve until the pump runs continuously
while the faucets are running and the sink is draining.
If the water level rises with the pump on, slightly open
the discharge valve to balance the flow. If it drops,
slightly close the discharge valve.
Union
(Purchased
Separately)
Union
(Purchased
Separately)
Adapter
Shut-Off / Flow-Balancing Valve
Check
Valve
Check Valve
(Alternate
Location)
“This End Up”
Figure 2: Pump Installed.