Pentair MasterTemp/Max-E-Therm 400 LP to Natural Gas Conversion Kit (77707-1411) pooltool In gunite-style applications

In gunite-style applications

premium feel that is well suited to rebuilds where part quality matters as much as fit

Correct replacement matters because ozone-related components should match the original electrical and system relationship of the spa for the cleanest final result

Replacing the full 4-pack together can help restore clearer water and more consistent filtration

and this Polaris and Zodiac version is a 1

Pentair MasterTemp/Max-E-Therm 400 LP to Natural Gas Conversion Kit (77707-1411) pooltool In gunite-style applicationsKeep the repair centered on the right component with this MasterTemp and Max E Therm 400 LP to Natural Gas Conversion Kit. It is designed for fuel conversion service where matching the correct heater model, BTU range, and gas type is critical before installation. It helps support proper combustion setup after a qualified service professional verifies manifold pressure, orifices, labeling, and local code requirements. Matching by part number 77707 1411