Installation • Operation
5
4. Install a check valve in the vertical pipe (see
Figure 2) to prevent flow backwards through
the pump when it shuts off. To prevent
airlocking the pump, drill a 1/8” (3.2 mm)
hole in the discharge pipe just above where
it screws into the pump discharge. Install the
check valve above this hole, but keep it as
close to the pump as possible. Be sure the
hole is below the waterline and below the
check valve.
5. To reduce motor noise and vibrations, a
short length of rubber hose (1-7/8” (47.6mm)
I.D., e.g. radiator hose) can be connected
into discharge line near pump using
suitable clamps.
Risk of flooding. Can cause
personal injury and/or property damage.
If a flexible discharge hose is used, make
sure pump is secured in sump to prevent
movement. Failure to secure pump may allow
pump movement, switch interference and
prevent pump from starting or stopping.
6. The switch is set to operate at these settings:
Switch Setting in inches (mm)
On
Off
7.5” (190)
3” (76)
7. Place the pump in the sump; make sure that
nothing interferes with switch operation.
8. Finish installing the necessary plumbing.
Follow the glue manufacturer’s instructions for
safety precautions and curing time.
6203 0410 CL
Figure 2
6305 1010
Figure 3
6204 0410
Figure 4
