Lennox 63W57 Pressure Switch Els PW 17895 It is standard industry practice

It is standard industry practice to replace the sleeve when the differential pressure reaches 10 psi (0

This assembly is designed for drop-in compatibility with Powers ETV400-10 and ETV400-15 series electronically tempered valves

protecting delicate internal windings from excessive heat

is designed with a black jacket and red stripe to ensure rapid pneumatic circuit identification during multi-line installations

Featuring a 3/4" FNPT inlet and a 3/4" MNPT union tailpiece

Lennox 63W57 Pressure Switch Els PW 17895 It is standard industry practiceThe Lennox 63W57 Pressure Switch is a critical genuine OEM component engineered for precise furnace diagnostic monitoring. This SPST furnace pressure switch is factory calibrated with a 0. 55 . 95" WC pressure rating, ensuring the inducer motor provides sufficient draft for safe combustion. As a direct replacement for Lennox 56M22, the 63W57 eliminates compatibility guesswork during emergency service calls. It functions as a safety interlock,