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Figure 2.
4. In situations where the piping is long, vertical discharge is
above 7 or 8 feet, or a small pit has been provided, use of a
check valve is recommended to prevent backflow of water into
the sump. When a check valve is used, drill a relief hole (1/8"
or 3/16" diameter) in the discharge pipe. This hole should be
located below the floor line between the pump discharge and
the check valve. Unless such a relief hole is provided, the
pump could "air lock" and will not pump water even though it
will run.
5. Tape pump and switch cords to discharge line with electri-
cian's tape. This will protect the cord from damage.
2
6. TEST THE PUMP AFTER ALL CONNECTIONS HAVE BEEN
MADE. Run water into sump. Do not attempt to operate the
pump without water; this will damage the seals and bearings
and could result in permanent damage to the pump. Fill sump
to normal "on" level and allow pump to remove to the normal
"off" level (see Figure 2).
7. Place cover over sump. This cover will help prevent solid
debris from filling the pit and will guard against accidental
injury.
WARNING: Always disconnect the electrical power before touching
the pump or discharge when water is present in the sump. Failure
to do so can result in hazardous electrical shock.
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