Air Flow Switch and Pressure Switch Replacement AFS for Pentair MasterTemp 125 200 300 400 Pool Heaters and Sta Rite Max E Therm Water Heaters Electrical System Compatible

Air flow switch replacement for pool heaters
✔️ Compatible with MasterTemp 125-400 heaters and Sta-Rite Max-E-Therm

This AFS is a dedicated air flow and pressure switch replacement designed for outdoor pool heater systems. It monitors real-time airflow to shut down the heater when airflow is insufficient, preventing overheating and dry firing. It fits Pentair MasterTemp 125, 200, 300, 400 low-nox pool heaters and Sta-Rite Max-E-Therm water heaters, replacing 42001-0059s and 42001-0061s for straightforward upgrades.

✅ Replaces 42001-0059s and 42001-0061s for direct compatibility
✅ Real-time airflow and pressure monitoring to protect the system
✅ Durable construction from high-quality plastic and copper alloy for outdoor use
✅ Includes 1 air flow switch, 2 constant tension hose clamps, 2 screws, 2 hoses

💡 What is an air flow switch used for in pool heater systems? It's a handy safety feature that ensures proper airflow and protects the heater. - monitors airflow in real time and shuts the heater if airflow is insufficient
- helps prevent dry heating and energy waste
- provides an easy replacement path with included hardware