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6 | EN

Copyright © Liberty Pumps, Inc. 2019 All rights reserved.

4617000L

6.

Attach the 2” check valve to the discharge pipe as close to the 

top of the tank as possible. Make sure that the arrow on the 

check valve is pointing up, away from the pump.

Do not reduce the discharge pipe size below 2".

7.

Complete the discharge piping to the house waste line using 

a minimum number of turns.

8.

Install a 2" vent pipe into the vent opening on the cover.

9.

Connect the vent pipe to the house vent line or directly to the 

atmosphere. Unit must be vented in accordance with local 

plumbing codes.

Do not use an air admittance valve or a mechanical 

spring-loaded venting device.

10.

If installing a finished floor above the LowPro tank system, 

continue with steps 11 through 13, otherwise, resume 

installation at step 14.

11.

The rough opening size required for installation using 

standard 2” x 6” floor joists will vary depending on the actual 

installation and the orientation of the tank. The overall rough 

opening size needed to enclose the entire LowPro tank is 42” 

x 24-1/2”. See page 5 for 

Dimensional Data

.

12.

Measure the finished flooring thickness and determine the 

number of closet flange spacers needed to bring the closet 

flange up to the finish floor.

13.

Set the proper number of plastic closet flange spacers onto 

the brass closet flange. 

The foam gasket material on the 

spacer(s) must be facing down.

 The spacer(s) will not be 

secured to the closet flange, so use care not to move them 

during the installation of the toilet.

14.

Install the provided wax toilet bowl seal ring onto the toilet 

following the directions included with the toilet.

15.

Install the toilet onto the closet flange following the 

directions included with the toilet.

16.

Hook up the water line to the toilet.

17.

Turn the water on and fill the toilet tank. Test for leaks. Flush 

the toilet several times and allow the pump to cycle to ensure 

proper operation.

Sample Illustrations

 Figure 1. Typical Finished Installation and

Optional Toilet Orientation

 Figure 2. Elevated Shower Side View

Maintenance and Troubleshooting

 

Accidental contact with electrically live parts, items, fluid, or 

water can cause serious injury or death.

 

Always disconnect the pump from power source before 

attempting to service the pump. Fatal electrical shock could 

occur.

 

 Maintenance

The LowPro system requires no routine maintenance. The exterior 

of the unit may be cleaned with a damp cloth and normal 

household cleaners. Never spray or dump water or chemicals 

directly on the unit.
If a washing machine is connected, periodically remove the access 

cover to clean lint and debris from the float switch.

2 x 6 Floor Joist

LowPro Tank

Subfloor 

(plywood, etc.)

Finish Flooring

(tile, linoleum, etc.)

Two supplied

(1/4” and 1/2”)

May be stacked for 

total of 3/4”

Spacers

RISK OF FIRE

Summary of Contents for LowPro41LP

Page 1: ...Pumps com Copyright Liberty Pumps Inc 2019 All rights reserved 4617000L This product supplied with a CSA Certified pump LowPro Series Low Profile Sewage System Models LowPro41LP 4 10 hp 115V LowPro51L...

Page 2: ...serious injury or death It is accompanied with an instruction intended to minimize potential risk of injury or death Warns of hazards which if not avoided will result in serious injury or death Warns...

Page 3: ...d for the voltage and amperage requirements of the pump as noted on the nameplate Overloaded branch circuit wires will get very hot and can catch on fire When used electrical outlets shall be simplex...

Page 4: ...tallation area is not complete If storage is necessary the LowPro system should remain in its shipping container It should be stored in a clean dry temperature stable environment where the pump system...

Page 5: ...a washing machine the preferred method is to drain the washer into a tub sink with a lint sock prior to the LowPro This requires periodically removing the access cover to clean lint and debris from th...

Page 6: ...nto the brass closet flange The foam gasket material on the spacer s must be facing down The spacer s will not be secured to the closet flange so use care not to move them during the installation of t...

Page 7: ...sin or other obstruction Position the pump or float switch so that it has adequate clearance for free movement Insufficient liquid level Verify the liquid level is allowed to rise enough to activate t...

Page 8: ...e of its products or for indirect incidental and consequential damages including costs of removal reinstallation or transportation There is no other express warranty All implied warranties including t...

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