Product Overview

The Pentair Natural Gas to Liquid Propane 400K Conversion Kit | 77707-1441 is a genuine Pentair replacement conversion kit designed to convert compatible 400,000 BTU Pentair pool and spa heaters from natural gas (NG) to liquid propane (LP).

This kit is commonly used with compatible Pentair MasterTemp 400K and Sta-Rite Max-E-Therm 400K heater models. It is intended for proper fuel conversion when propane is required instead of natural gas.

Ideal For

Pool owners, service technicians, and installers converting a compatible 400K BTU Pentair or Sta-Rite heater from natural gas to propane.

Key Features

Natural Gas to Propane Conversion: Converts compatible 400K BTU heaters from NG fuel to LP propane fuel.

Genuine Pentair Replacement Kit: OEM Pentair part designed for proper fit and reliable heater operation.

For 400K BTU Heater Models: Made for compatible 400,000 BTU pool and spa heaters.

Compatible with Select MasterTemp and Max-E-Therm Heaters: Commonly used with Pentair MasterTemp 400K and Sta-Rite Max-E-Therm 400K heater systems.

Supports Proper Fuel Setup: Helps ensure the heater is configured for the correct gas type.

Professional Installation Recommended: Gas conversion should be completed by a qualified pool heater technician or licensed gas professional.

Benefits

Allows a compatible heater to operate on propane instead of natural gas

Useful when propane is the available or preferred fuel source

Helps maintain proper heater performance after conversion

OEM kit helps ensure correct fit and compatibility

Ideal for heater repairs, replacements, or fuel-source changes

Helps avoid improper gas setup when converting fuel types

Specifications

What’s Included

• Conversion kit components for natural gas to liquid propane setup
• Common kit components may include clamp assembly, O-ring, and silicone tube

Warranty & Compatibility

Designed for compatible 400K BTU heater models, including select:

• Pentair MasterTemp 400,000 BTU heaters
• Sta-Rite Max-E-Therm 400,000 BTU heaters
• Natural gas heater models requiring conversion to liquid propane

Always confirm the heater model, gas type, BTU rating, and manufacturer requirements before ordering.

Customer-Facing Q&A

Q: What does the Pentair 77707-1441 conversion kit do?
A: It converts compatible 400K BTU Pentair or Sta-Rite pool heaters from natural gas to liquid propane.

Q: Is this for a 400,000 BTU heater?
A: Yes. This kit is designed for compatible 400K BTU heater models.

Q: Does this convert propane to natural gas?
A: No. This kit is for natural gas to liquid propane conversion. It should not be used for LP-to-NG conversion.

Q: What heaters is this commonly used with?
A: It is commonly used with compatible Pentair MasterTemp 400K and Sta-Rite Max-E-Therm 400K heaters.

Q: Can a homeowner install this kit?
A: Gas conversion work should be performed by a qualified technician or licensed gas professional to ensure safe operation and code compliance.

Q: How do I confirm this is the correct kit?
A: Verify your heater model number, BTU rating, and current gas type. This part number is 77707-1441 and is intended for compatible 400K BTU natural gas heaters being converted to propane.