Pentair MasterTemp / Max-E-Therm 400 Heat Exchanger – SKU 77707-0234 (Natural Gas / LP)

Restore peak efficiency to your pool heating system with the Pentair MasterTemp / Max-E-Therm 400 Heat Exchanger (77707-0234). Designed for both natural gas and propane (LP) systems, this OEM replacement ensures reliable performance and long life for MasterTemp and Max-E-Therm 400 heaters.

Key Features & Benefits

Precision OEM Fit: Direct replacement for Pentair MasterTemp & Max-E-Therm 400 models—no modifications required.
Natural Gas & LP Compatible: Engineered to function safely and efficiently with both fuel types, giving flexibility in installation and fuel choice.
Durable Construction: Built with premium materials to withstand repeated heating cycles while resisting corrosion and mineral buildup.
Enhanced Heat Transfer: Optimized passageways improve thermal performance, ensuring fast recovery times and stable water temperature.
Reduced Maintenance: OEM design helps prevent leaks and extends lifespan, lowering the frequency of service and downtime.

Ideal For

Owners of Pentair MasterTemp or Max-E-Therm 400 gas heaters in need of a replacement heat exchanger.
Pool service professionals replacing worn-out or inefficient heat exchangers to restore system capacity.
Facilities and homeowners looking to ensure safe, efficient, and reliable heating for their pool water.

Technical Specifications

Specification	Detail
Brand / Model Family	Pentair MasterTemp / Max-E-Therm 400
Part Number (SKU)	77707-0234
Fuel Type Compatibility	Natural Gas & Propane (LP)
Fit Type	OEM Heat Exchanger Replacement

Why Choose This Heat Exchanger?

A failing heat exchanger can cause slow heating, higher fuel costs, and instability in temperature control. Replacing it with the genuine Pentair component ensures optimal heat transfer, improved system safety, and long-term reliability. You’ll get smoother operation, fewer service calls, and peace of mind knowing your pool heater is running at its best.

Guarantee

Authentic Pentair part — quality you can trust.
Available through Best Buy Pool Supply with free shipping on orders over $100* and a 30-day return policy.
Expert customer service and technical support to confirm fit, installation, and operation.

Don’t let a worn heat exchanger compromise your pool’s comfort. Order the Pentair 77707-0234 heat exchanger today and get your pool heater performing like new.

*Free shipping applies to orders over $100 and subject to availability.