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this unit provides high-accuracy detection of CO levels
verify the vacuum tubing is clear of debris and the venting system is unobstructed
the 720 Series valve operates within a temperature range of -40°F to 175°F
Specifically engineered for 2-way direct-acting gas shutoff valves with AC coils—including models 8040G021
McDonnell & Miller 310462 Switch Assembly Els PW 29614 this unit provides high-accuracy detectionThe 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
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