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Its rugged construction and CSA certification make it the industry standard for 2 PSI piping systems
Robust Construction: Built to withstand the high ambient temperatures common in sealed combustion chambers
Always verify the manufacturer's cross-reference list before substituting this part in non-York equipment
For contractors managing retrofit projects
McDonnell & Miller 310462 Switch Assembly Els PW 17895 Its rugged construction and CSAThe 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