Liberty Pumps SPAC Series - Manual (Page 3)

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Application: The SPAC-237, SPAC-457 and SPAC-S37 are designed as drop in sump pump solutions for residential
applications. These systems come completely pre-assembled from the factory for a simple and worry free installation.
A. INLET: The SPAC-237, SPAC-457 and SPAC-S37 are supplied with (2) 4” inlet pipe grommets. In order to install an
inlet pipe, a 4” diameter hole must first be drilled in the round inlet recess on the side of the basin using a hole saw.
Next, insert the supplied grommet into the recess in the side of the tank where the hole was just drilled. Finally slide
the pipe into the grommet until it is fully seated against the stop. If an additional inlet pipe is desired, repeat the above
steps for the opposite side of the tank.
B. DISCHARGE: The SPAC-237, SPAC-457 and SPAC-S37 are supplied with a 1 ½”, Schedule 40, PVC discharge
pipe. The discharge pipe extends 4” above the basin cover. It is recommended that a compression style fitting is used
to connect the system to the permanent plumbing within the home. The permanent plumbing should discharge the
water in an area that will drain away from the building and foundation.
C. CHECK VALVE: The SPAC-237, SPAC-457 and SPAC-S37 are not supplied with check valves. If the pump is short
cycling, then a check valve may be required. This would prevent water from draining back through the discharge
piping into the basin. When using a check valve, the discharge line must be protected from freezing by running the
discharge deep enough below ground level to be beneath the frost line. See Fig. 1
D. POWER CORD: The pump power cord is equipped with a grounding conductor and grounding-type 3-prong plug. It
should be connected to a separately fused, grounded, 3-wire grounding-type receptacle of 15-amp capacity with the
proper 115V. Make sure all electrical wiring and connections are in accordance with the National Electric Code and
all applicable local codes.
E. BACK-UP PUMPS: For added protection, consider the addition of a back-up pump such as Liberty’s SJ10A
SumpJet (water powered back up pump) or Liberty’s 441 (battery powered back-up pump). If no additional back up
pump is installed, and there is risk of property damage in the event of flooding due to loss of pump operation,
Liberty’s ALM-2 should also be considered as an additional means of protection. If an alarm is used, it must be
connected to a separate electrical circuit.
Fig. 2 – Performance curve for all models