this switch offers high accuracy and rapid response times (open high pressure)

Key Benefits Ensures Modutrol IV compatibility with legacy systems by raising the motor shaft 19 mm for exact alignment

This genuine York replacement part features a high-grade diaphragm and resilient casing to withstand the thermal stress of residential and light-commercial applications

For technicians servicing legacy R-22 equipment

Engineered to maintain precise superheat control

McDonnell & Miller 51-S Feeder Freon this switch offers high accuracyThe McDonnell & Miller 51 S (Part Number 135600) is a heavy duty mechanical water feeder designed specifically for high capacity steam and hot water boilers. Engineered for systems with a maximum vessel pressure of 35 PSI and a maximum water supply pressure of 100 PSI, this unit provides a reliable proportional feed action to maintain optimal water levels without the hunting common in electronic setups. It features 1" NPT connections for high flow