Pentair Max-E-Therm/MasterTemp Air Flow Switch (42001-0061S) productsunlimited everyday spa operation can become

everyday spa operation can become more difficult than it should be

Useful replacement for compatible multiport valve setups

Designed for compatible 1-3/4 inch hole-size applications

A working solenoid valve can help restore controlled chemical delivery and support more dependable water treatment performance

Replacing the main body can turn a struggling rebuild into a cleaner and much more confidence-inspiring repair

Pentair Max-E-Therm/MasterTemp Air Flow Switch (42001-0061S) productsunlimited everyday spa operation can becomeHelp the heater verify proper airflow before ignition with this air flow switch for compatible Max E Therm and MasterTemp systems. The switch is part of the safety and control sequence, confirming that the combustion air system is operating before the heater continues through startup. A failing air flow switch may contribute to ignition problems, shutdowns, or diagnostic issues when the blower and venting system are otherwise serviceable. This