McDonnell & Miller 51-S-2-HD Cut Off Freon restricting gas flow to the

restricting gas flow to the pilot only during the manual lighting cycle

Critical Components Included: Features the specialized bleed port fittings and elbows necessary for the normally-closed operation of the E-Series

The York S1-373-19806-100 utilizes a wrap-around design to distribute clamping force evenly across the motor shell

the S1-363-90016-701 ensures reliable flue gas containment and optimal AFUE ratings

McDonnell & Miller 51-S-2-HD Cut Off Freon restricting gas flow to theThe McDonnell & Miller 51 S 2 HD (Part Number 136200) serves as a heavy duty head mechanism only for professional grade water level control. Engineered for high capacity low pressure steam and hot water boiler systems, this unit integrates a mechanical water feeder with a low water cut off (LWCO) function via a built in Snap Acting SPDT switch (No. 2 Switch). It is designed to handle a maximum vessel pressure of 35 PSI and an inlet water supply up to