Hayward FDXLHXA1250 OEM Heat Exchanger Assembly H250FD 250K BTU Pool Heater

The Hayward FDXLHXA1250 is a genuine OEM replacement heat exchanger assembly engineered specifically for the Hayward Universal H-Series Low NOx H250FD pool and spa heater. If your heater is failing to maintain water temperature or showing signs of heat exchanger damage, this factory-original component restores full heating efficiency and extends the life of your investment.

🚩 PRO TIP

A failing heat exchanger is often indicated by water leaking from the heater cabinet, a drop in heating efficiency, or visible corrosion on the exchanger body. Always flush and clean the plumbing connections before installing the new exchanger to prevent scale buildup from reducing performance. Professional installation is recommended for this repair.

PRODUCT FEATURES

• Genuine Hayward OEM replacement — built to exact factory specifications for the H250FD
• Complete Assembly: Includes the front header with a pre-installed water pressure switch and high-limit sensors.
• Restores full heating efficiency and consistent water temperature performance
• CuproNickel construction for superior corrosion resistance and long service life
• Fits both natural gas and propane (LP) 250K BTU H250FD models
• 2" x 2.5" CPVC union plumbing connections for easy in-line installation
• Meets Low NOx emissions standards — clean air quality compliant
• Direct-fit replacement — no modifications required

TECHNICAL SPECIFICATIONS

• Part Number: FDXLHXA1250
• Substitute Part Numbers: HPPFDXLHXA1250, HAY-151-0005
• UPC: 610377073738
• BTU Rating: 250,000 BTU
• Plumbing Connections: 2" x 2.5" CPVC Union
• Material: CuproNickel
• Weight: 35.5 lbs
• Compatible Models: H250FDN, H250FDP (Hayward Universal H-Series Low NOx)
• Series: Hayward Universal H-Series Low NOx FD

Frequently Asked Questions (FAQ)

Does this fit my 400K BTU Hayward heater? No, the FDXLHXA1250 is strictly for 250,000 BTU heaters (H250FD models).

Is this heat exchanger suitable for saltwater pools? Yes, this assembly is constructed from CuproNickel, which is highly recommended for saltwater pools due to its superior corrosion resistance compared to standard copper.

Is this an aftermarket or OEM part? This is a genuine OEM (Original Equipment Manufacturer) Hayward part.

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