McDonnell & Miller 310462 Switch Assembly R-410A Always verify the opening and

Always verify the opening and closing temperatures against your unit's wiring diagram to ensure proper safety compliance

Operational Efficiency: Optimizes static pressure to ensure safe and reliable furnace venting

it utilizes a non-stick PTFE (Teflon) disc-to-metal seat

The 1/4" male SAE flare connector provides a secure

McDonnell & Miller 310462 Switch Assembly R-410A Always verify the opening andThe McDonnell & Miller 310462 (Model SWA 150S) is a heavy duty snap action switch assembly designed for precise low water cut off and pump controller transitions. This automatic reset assembly is a critical replacement component for Series 150S and Series 157S mechanical boiler controls. Built to manage steam boiler water levels up to a maximum operating pressure of 150 psi, the SWA150S provides reliable SPDT switching to prevent dry fire conditions