Pentair Max-E-Therm/MasterTemp Gas Shutoff Switch (42002-0025S) reducers Check spring tension

Check spring tension

Reference part number 2920812431 when verifying compatibility

That added area can be especially valuable in demanding applications where keeping water cleaner for longer periods matters

and reliable poolside use are just as important as basic fit

Skimmer collars help define and support the upper skimmer opening while maintaining a clean

Pentair Max-E-Therm/MasterTemp Gas Shutoff Switch (42002-0025S) reducers Check spring tensionRestore gas shutoff switch function on compatible Max E Therm and MasterTemp heaters with this replacement switch. This component supports the heaters safety controls by helping interrupt gas operation when required by the system design. It is a useful replacement when the original switch is damaged, inconsistent, corroded, or identified during troubleshooting. Because it is part of the gas and safety control circuit, it should be matched carefully