Product Manual

– 4 – Copyright © Liberty Pumps, Inc. 2018 All rights reserved. 7212000F
Dimensions
11-1/8”
[28.35cm]
11-5/8”
[29.6cm]
10-1/8”
[25.8cm]
14-1/8”
[35.87cm]
12-5/8”
[32.07cm]
Figure 1. Model 404 and 405 Cover Dimensions
Figure 2. Model 404 Basin Dimensions
Figure 3. Model 405 Basin Dimensions
Application
The Model 404 and 405-Series drain pumps are designed for use
in gray wastewater applications. They will handle small debris and
solids, such as laundry lint (up to 3/8”), associated with normal
gray water drainage from a sink. Larger solids should be kept out
of the pump system. The 405-Series is designed for commercial
applications where higher temperature drain water (up to 180°F)
may be used.
Installation
Inlet
The drain pump has two available ports: one on the top, the other
on the side. Either can be used as a vent or inlet. Using the
appropriate piping (1-1/2” on 404 and 404CV models and 2” on
404L and all 405 models), connect the fixture (i.e., laundry tub,
basement sink, washing machine) to the pump. Refer to Figure 4
for a typical installation.
NOTICE
 Hand-tighten only
 Do not cross thread
A trap shall be used between the fixture a
nd pump; a flange type
is recommended. Hand-tighten trap to pump.
Figure 4. Typical Residential Installation
Discharge
NOTICE
 Hand-tighten only
 Use appropriate thread sealing tape
 Do not cross
thread
Install a union just above the pump to fa
cilitate removal, if
necessary, for cleaning or service. Install a check valve (not
included except for CV models listed below) just above the union
and as close to the pump as possible to prevent the backflow of
water after each pump cycle.
Check Valve for CV Models
Models 404/CV, 404CV/A, and 404CV/A-EYE come with a check
valve in order to meet ASME A112.3.4/CSA B45.9. This check valve
must be threaded into the discharge port of the 404 cover.
Vent
NOTICE
 Hand-tighten only
 Do not cap-off vent
 D
o not use one-way quick-vents or air admittance valves as
they will not guarantee proper fixture performance
Provision is made for a vent stack to
allow extra volume for high
suds conditions, and to ensure proper drainage of the fixture. The
vent pipe should have a union to facilitate removal, if required,
and shall be connected directly to a building or house vent.
13-3/4”
[34.9cm]
13-11/16”
[34.7cm]
Inlet or Vent
Access Cover
Alternate
Inlet or Vent
Discharge