Return your 300 series heater to full thermal capacity with the Pentair Tube Sheet Coil Assembly 77707-0233, a factory-original heat exchanger replacement engineered for high-output heater models. This kit serves Pentair MasterTemp pool and spa heater models 300NA and 300LP, as well as the Pentair Sta-Rite Max-E-Therm NA and LP series pool/spa heater model 300. Shipped complete with a coil sealing o-ring kit and essential gasket components, the assembly is sized at 18-1/2 inches in length, 10-1/2 inches in height, and 18-1/2 inches in width for exact-fit installation. Built from materials rated for the demanding thermal environment inside a heater combustion chamber, this kit restores efficient heat transfer and reliable operation.

Key Benefits

• Multi-Platform Compatibility: Serves both Pentair MasterTemp 300NA/300LP and Sta-Rite Max-E-Therm NA/LP model 300 heaters, consolidating replacement needs into a single kit.
• Everything in One Box: Ships with a coil sealing o-ring kit plus all gaskets and supporting components, making additional part sourcing unnecessary.
• Exact-Fit Dimensions: Sized at 18-1/2" L x 10-1/2" H x 18-1/2" W to slide directly into your heater's combustion chamber without any modifications.
• Built for High-Heat Environments: Manufactured using materials that resist thermal fatigue, corrosion, and combustion byproducts for sustained operational reliability.
• Streamlined Maintenance: Consolidates all necessary replacement components into one package, simplifying the repair process and reducing your heater's downtime.

What's Included

• Pentair Tube Sheet Coil
• Pentair 77707-0011 Blower Adapter Plate Gasket Kit
• Pentair 77707-0054 Igniter and Gasket Kit
• Pentair 474201 RTV Silicone
• Pentair 77707-0008 Insulation Kit
• O-Rings

Compatibility

• Pentair MasterTemp Heaters Models: 300NA, 300LP
• Pentair Sta-Rite Max-E-Therm Heater Model: 300, 333

Specifications

• Brand: Pentair
• Part Number: 77707-0233

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77707-0233
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