Pentair Air Flow Switch | MasterTemp & Max-E-Therm Pool Heaters | 42001-0061S C9494 valve Compatibility is based on

valve Compatibility is based on Pentair parts documentation and available OEM records

EDTA titration (includes inhibitors to prevent metal interference) 1 drop = 10 ppm calcium hardness as CaCO₃ Chlorine

or dedicated water feature pump)

This is the product of choice in areas with hard water problems

or o-rings

Pentair Air Flow Switch | MasterTemp & Max-E-Therm Pool Heaters | 42001-0061S C9494 valve Compatibility is based onThe Pentair Air Flow Switch (42001 0061S) is the OEM replacement air flow switch for Pentair MasterTemp and Pentair (formerly Sta Rite) Max E Therm pool heaters. IMPORTANT: HEATER COMPONENT LICENSED TECHNICIAN 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. The air flow switch monitors