User Manual Q&AAnswer
Feb 26, 2025 - 11:25 PM
To install the Liberty Pumps 404 1/3 hp Residential 115V Automatic Drain Pump, follow these steps:
1. Inlet: The pump has two available ports, one on the top and the other on the side. Either port can be used as a vent or inlet. Connect the fixture (e.g., laundry tub, basement sink, washing machine) to the pump using the appropriate piping (1-1/2" on 404 and 404CV models, and 2" on 404L and all 405 models). Use a trap between the fixture and pump, preferably a flange type. Hand-tighten the trap to the pump.
2. Discharge: Install a union just above the pump to facilitate removal if needed for cleaning or service. Install a check valve (not included, except for CV models) just above the union and as close to the pump as possible to prevent backflow of water after each pump cycle.
3. Vent: Provide a vent stack to allow extra volume for high suds conditions and ensure proper drainage of the fixture. The vent pipe should have a union for easy removal if required and should be connected directly to a building or house vent.
4. Power Cord: Ensure that the electrical power supply is located within the length limitations of the pump power cord. For below-grade installations, the power supply should be at least 4 ft (1.22 m) above floor level. The pump power cord is equipped with a grounding-type 3-prong plug, which must be connected to a separately fused, grounded, 3-wire grounding-type receptacle of 15-amp capacity with the proper pump voltage (115V for all models except 405HV, which is 230V).
5. Alarm (if applicable): Models 404 and 405 with /A or /A-EYE come with a Liberty Pumps alarm. Refer to the included alarm manual for instructions on using the alarm.
For more detailed information and diagrams, please refer to the Liberty Pumps 404 1/3 hp Residential 115V Automatic Drain Pumps Instruction Manual.
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