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The 356904Z includes the Keypad Relocation Cable and a Blank Drive Cover
Spotting Bag (sold separately)
Always lubricate this O-ring style plug before installation
Keeping the cell properly supported during this service procedure helps protect the electrodes and extends cell life
Hayward Pressure Switch for FD Series Heaters | FDXLWPS1931 Return / Inlet Fittings The 356904Z includes the KeypadThe Hayward Pressure Switch (FDXLWPS1931) is the OEM replacement water pressure switch for Hayward FD Series pool and spa heaters. IMPORTANT: PROFESSIONAL SERVICE REQUIRED Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high voltage components without proper certification. This pressure switch monitors water flow conditions within the heater and
