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Includes the air cell, washers, O-rings, sealing ring components, and instructions needed for installation
Built with durable materials and EPDM O-rings and seals
Equipped with a 1 1/4" NPTM connection that fits Quick Connect Series quick connect connectors
Dimensions: 24" X 42"
Set pre-charge pressure 4 PSI below pump cut-in pressure during installation
Pressure switch differential should not exceed 20 PSI
Check air pressure with a pressure gauge or gauge during setup
A failed or waterlogged air cell can cause a well pump to run improperly, and waterlogged tanks can short cycle frequently; replacing the WellMate bladder can restore proper water pressure
No control box required for installation
Instructions help remove the old air cell and install the replacement correctly
Recommended replacement time: approximately 108 months under normal conditions
Genuine replacement parts are designed to help prevent premature failures often seen with universal options
Replacement air cell kit for Wellmate Quick Connect Series tanks with a fixed MPT connection. In water well systems, air cells in pressure tanks maintain water pressure. This product lets you replace the internal bladder/air cell in a wellmate pressure tank, and captive air tanks use an internal air bladder that can fail if that bladder ruptures; WellMate tanks use a composite design that allows internal air cell replacement instead of making a full tank change; this WM-20WB / WM0235 PEU kit is sized 24" X 42", uses a 1 1/4" NPTM connection, and for correct installation setup the pre-charge should be set 4 PSI below pump cut-in pressure.
The WellMate WM-20WB / WM0235 PEU Air Cell Replacement Kit is designed for seamless compatibility with a wellmate water pressure tank used in your water system. It helps you perform routine maintenance and troubleshooting by replacing the bladder to restore normal water pressure, support reliable pump performance, restore stable air-to-water separation, extend the life of well pump systems, and cost less than buying a new pressure tank.
Model #: CH4846 for WM-20WB
Manufacturer : WellMate
Size: 24" X 42"
Discharge Connection: 1 1/4" NPTM
Shipping Weight: 11 lbs
Drawdown @ 30/50 PSI range: 18
Drawdown @ 40/60 PSI: 16.2
| Drawdown @ 40/60 PSI | 16.2 |
|---|---|
| Drawdown @ 30/50 PSI | 18 |
| Discharge Connection | 1 1/4" NPTM |
| Capacity | 60 |
| Size | 24" X 42" |
| Source | https://www.pentair.com/ |
| Model # | CH4846 for WM-20WB |
| Manufacturer | WellMate |
| Performance Chart | None |
| Shipping Weight | 11 |
This air cell replacement kit is intended for supported Wellmate WM-20WB / WM0235 PEU tank applications.

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