Hayward Pressure Switch for FD Series Heaters | FDXLWPS1931 Return / Inlet Fittings capturing a broader range of

capturing a broader range of pool debris during the cleaning cycle

Controlled Release Technology (CRT) ensures optimal mineral levels with no staining

The 356904Z includes the Keypad Relocation Cable and a Blank Drive Cover

Always lubricate this O-ring style plug before installation

Hayward Pressure Switch for FD Series Heaters | FDXLWPS1931 Return / Inlet Fittings capturing a broader range ofThe 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