OEM Hayward Bypass Valve Kit HAXBPK1931 is a genuine replacement kit designed for Hayward H-Series pool heaters manufactured before October 28, 2000. Specifically engineered for compatibility with Millivolt and Electronic ED1 style heaters, this kit includes the essential bypass valve, which regulates internal water flow to ensure safe and efficient heater performance. Constructed to HaywardÕs original specifications, this replacement part helps prevent overheating and maintains optimal heating function for older H-Series units. Regular replacement is essential to prolonging heater life and preserving reliable operation.

• Replacement Kit for Older Models: Designed for H-Series heaters made before October 28, 2000 for proper fit and functional compatibility

• Supports Millivolt & ED1 Heaters: Tailored for use in Millivolt and Electronic ED1 heater systems in legacy Hayward setups

• Includes Critical Flow Control Components: Comes with a bypass valve that manages water flow to prevent overheating and maintain consistent operation

• Genuine Hayward Engineering: Matches OEM specifications to ensure a reliable fit and restoration of original heating performance

• Maintains Safe Heater Function: Helps your older heater run efficiently and safely by regulating water passage through the system

• Hayward H-Series Heaters
• Hayward H-Series ED1 Heaters

Note: Compatible with heater models manufactured before 10/28/2000

Bypass Valve Kit for Pre-2000 Hayward H-Series Heaters

haxbpk1931 bypass kit for ed1 heaters before october 2000

how to replace bypass valve in older h-series heater

fix overheating issues with hayward bypass valve kit

restore flow control on millivolt style heater

in-store pickup available for hayward haxbpk1931 bypass kit

Troubleshooting Flow and Overheating Issues

heater shutting down from poor water flow fix bypass valve

bypass valve stuck causing temp spikes in heater

pressure fluctuation from faulty bypass kit components

water not circulating properly check bypass assembly

restore internal balance with bypass valve replacement

Compatibility and Installation Help

haxbpk1931 fits h-series heaters made before 10-28-2000

compatible with hayward millivolt and electronic ed1 units

step-by-step install for pre-2000 heater bypass valve

includes components needed to regulate internal flow

install bypass kit in-store for safe heater performance