OEM Hayward Water Pressure Switch FDXLWPS1931 is a critical safety and performance component for Universal H-Series Low NOx and HDF pool heaters. This switch continuously monitors internal water pressure, ensuring the heater only operates when flow conditions are within a safe range. By preventing the unit from firing under low-flow scenarios, it protects key components from overheating and premature wear. Made from high-quality, corrosion-resistant materials, the FDXLWPS1931 offers reliable functionality for both routine service and emergency repairs, helping to maintain heater efficiency and operational safety over time.

• OEM-Fit for H-Series and HDF Heaters: Precisely designed for seamless compatibility with Hayward Universal Low NOx and HDF400 heater models

• Monitors Internal Water Pressure: Detects insufficient flow and halts ignition to prevent heater damage due to unsafe operating conditions

• Supports Safe Heater Performance: Ensures that heating only occurs under optimal flow, reducing risk of overheating or internal failure

• Built for Harsh Pool Environments: Manufactured with premium materials to withstand prolonged chemical exposure and water pressure fluctuations

• Ideal for Ongoing Maintenance and Repairs: Plays a vital role in sustaining heater longevity and safety through regular servicing or component replacement

• Hayward H-Series Heaters Models: H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, H400FDP, H500FD
  
• Hayward HDF Series Heater Models: HDF400