Pentair Natural Gas to Propane Conversion Kit for Max-E-Therm 400K BTU | 77707-1341
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- SKU:
- 77707-1341
-
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About This Item
The Pentair 77707-1341 is the OEM Natural Gas to Propane (NG to LP) Conversion Kit for the Max-E-Therm 400,000 BTU gas heater — originally manufactured under the Sta-Rite brand, now part of the Pentair portfolio. If your Max-E-Therm 400 is currently configured for natural gas and you need to switch to propane supply, this is the factory-specified conversion kit for that model.
⚠️ IMPORTANT: THIS IS A KIT — NOT A SINGLE COMPONENT
This listing is a complete conversion kit containing multiple components required to convert the Max-E-Therm 400 from natural gas to propane operation. All components in the kit are required for a proper conversion — do not substitute individual pieces.
⚠️ IMPORTANT: LICENSED PROFESSIONAL INSTALLATION REQUIRED
Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high-voltage components without proper certification.
This conversion kit provides the components necessary to reconfigure the Max-E-Therm 400,000 BTU heater's gas valve and orifice assembly from natural gas to liquid propane (LP) operation. Natural gas and propane operate at different pressures and require different orifice sizing — using the wrong fuel type without a proper conversion kit can result in unsafe operation or equipment damage. This kit ensures the heater is correctly configured for propane supply at the factory-specified settings for the 400K BTU model.
Specifications
| Pentair Part Number | 77707-1341 |
| Also Known As / Legacy Part Number | Sta-Rite (now Pentair) Max-E-Therm NG to LP Conversion Kit |
| Fuel Conversion | Natural Gas (NG) to Liquid Propane (LP) |
| Compatible Heater Output | 400,000 BTU |
| Quantity Included | Kit |
Pro Tip
Before ordering, confirm your Max-E-Therm heater's current fuel configuration and BTU rating on the heater's data plate — this kit is specific to the 400,000 BTU model and the NG-to-LP conversion direction only. A separate kit is required if your heater is already configured for propane and you are converting back to natural gas. Have a licensed pool or HVAC technician verify the complete conversion against the Max-E-Therm installation manual before returning the heater to service.
