Instructions / Assembly

Base Products Corporation www.basepump.com 800 554 1426 page
5
Models: RB750 HB1000 CB1500 Copyright by Base Products Corporation 2017 Rev. May/2017
Installation Instructions (Outdoor Discharge)
Step 1. Mount Ejector on Joist
 Mount the Ejector above the sump against the side or bottom of one of the ceiling joists (See page 4). For Outdoor
Discharge, check the building exterior to make sure the discharge will clear any obstacles. Pump may be offset to
clear obstacles (See page 4).
 The suction pipe can be fitted in various ways to accommodate this location. Attach the mounting
clamps to the ceiling joist using 1" wood screws and snap the pump unit into the clamps.
Step 2. Install Outdoor Discharge
 **(For Indoor Discharge: Refer to pages 3 & 4 for Installation Notice and details.)**
 Drill a 1-1/2” hole through the building exterior wall for the discharge hose or PVC pipe. Vertical rises of more than 2
feet on the discharge will reduce pumping rates.
 Cement a 90° elbow (in most cases) onto the included discharge hose outside the
building, as shown. See page 4 for various installation options.
 Cement a short length of PVC pipe into the bottom of the Elbow to direct the water
down toward the ground. Use a 90º or 45º elbow to divert the flow away from the
foundation, onto the ground, a splash block, or into a larger drain pipe. Remember, this
is a back-up sump pump and will only run during a sump pump failure.
Step 3. Install Suction Pipe
 Locate the suction pipe in the sump to clear the primary pump and all obstructions (See
page 4). Cement the pipe into the PVC female fitting on the Suction Screen.
 Cut pipe to the proper length, cement the upper end into the Ejector check valve,
making sure that the lower end of the Suction Screen is approx. 2-4 inches above the
bottom of the sump. Either 45 or 90 degree elbows maybe used to offset the suction
pipe, if necessary (See page 4). Suction pipe may be fastened to the side of the sump, if
necessary, using the extra gray clamp included in the kit.
Step 4. Install the Float
 Clamp the Float Assembly to the suction pipe so the float ball hangs just above
the “normal high water level”; tighten clamp securely around the pipe.
 Make sure the Float Assembly clears your sump cover and that the float ball
moves freely; you may rotate or adjust the angle of the float ball to clear any
obstruction. You may need to cut the cover to help it clear.
Step 5. Connect Transfer Tube
 Push one end of the thin Transfer Tube into the open branch of the small Tee
on top of the Ejector until it passes through an O-ring and bottoms out. Hang
the tube down along the suction pipe to the Float Assembly. No need to cut off
excess; it may be coiled up loosely (don’t kink it) and tied off at the top near the pump or at the bottom near the float.
(If you do cut off the excess, leave about 12 Inches of slack for future adjustments.)
 Push lower end of the tube into the push connector at the top of the float assembly.
 Use included Hook ‘n Loop straps to attach the tubing to the suction pipe. Do not pinch or kink the tubing.
 To remove tubing from a fitting: PUSH in plastic ring while you PULL out the tubing.
Step 6. Connect Water Supply
 See recommended pipe and sizes at the bottom of page 2. Use approved plumbing procedures and materials to
connect the water supply from your home water source to the pump.
 NOTE: Flush the water pipe before final connection to the pump to remove any debris that may be inside the pipe
before it clogs or damages the Ejector.

Basepump Ejector Kit
Float Kit
Water Supply