McDonnell & Miller 310462 Switch Assembly Els PW 29614 verify the vacuum tubing is

verify the vacuum tubing is clear of debris and the venting system is unobstructed

The GC Valve S401GF02V9BF5 is a high-performance 2-way normally closed solenoid valve engineered for precision fluid control in demanding HVACR and industrial applications

eliminating the flame rollout or ignition sequence issues often associated with generic aftermarket controls

This model is supplied without a harness

this unit provides high-accuracy detection of CO levels

McDonnell & Miller 310462 Switch Assembly Els PW 29614 verify the vacuum tubing isThe 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