©Copyright 2018 Liberty Pumps Inc. All rights reserved.
7
3. Mechanical Installation
Never work in a sump pit with energized pumps. Doing so is
an electrical shock hazard, and can result in injury or death.
Unplug all pumps, including primary pumps, prior to work-
ing
on or installing this backup
1. Locate the level at which the primary pump activates by watching when the
pump turns on and measuring or marking the level in the sump.
2. Look at the supplied snap-on compact float and compare it to the image
shown to the right. The bumps on the left side of the LP lettering represent
the levels at which the switches inside the housing activate. Before cutting
your primary discharge piping, ensure that your float enclosure can be
mounted with the “Pump On” bump a minimum of 3” above the turn on
level of the primary pump, as measured in step 1.
3. Drain your sump pit to enjoy a clean, easy, and dry installation process.
Disconnecting and modifying the primary pump’s discharge piping is re-
quired to complete the installation of the 442. Complete this installation
during a time when the sump pit will not require pumping.
Instructions are continued by specific installation method below, as described in
Section 2-6
.
It is always recommended to do a ‘dry fit’ of piping, with no glue,
prior to gluing the piping in place. Be sure to not glue check valves closed.
Method A
4. Make a cut in the primary pump’s discharge piping above the primary
pump’s check valve. This cut will locate the tee used to install the 442
pump.
5. Install the tee and pre-glued nipple into the 442 pump discharge. Tighten
the hose clamp to 15 in-lbs, and mock up your 442 installation inside the sump pit without glue. Ensure that the 442 will not
interfere with the primary pump’s activation float.
6. Using a primer and glue approved for PVC use, glue the tee, nipple, and 442 assembly to the primary pump’s discharge pipe,
being careful not to glue the primary pump check valve closed.
7. Reinstall the remaining system discharge piping into the tee using an approved PVC glue and primer.
8. Install the compact snap-on float to the discharge piping, ensuring that the “Pump On” level is a minimum of 3” above the turn
on level of the primary pump. Use a small dab of PVC glue to secure the snap-on float to the discharge pipe.
Method B
4. Make a cut in the primary pump’s discharge piping above the primary pump. This will locate the tee used to install the 442
pump.
5. Install the supplied street elbow into the 442 pump discharge, with the street elbow facing the top of the pump. Tighten the hose
clamp to 15 in-lbs.
6. Install the tee, piping, and 90° elbow as depicted in the
Method B
image in
Section 2-6
, using PVC glue and primer and ensur-
ing that there will be no primary pump interference. Measurements for piping will vary by primary pump, system, and sump.
7. Reinstall the remaining system discharge piping into the tee using an approved PVC glue and primer.
8. Install the compact snap-on float to the discharge piping, ensuring that the “Pump On” level is a minimum of 3” above the turn
on level of the primary pump. Use a small dab of PVC glue to secure the snap-on float to the discharge pipe.
High Water Alarm
Pump On
Pump Ready/ Off
