McDonnell & Miller 318827 O-Ring What furnace brands are compatible

What furnace brands are compatible with the S1-9951-0961

Correct orifice sizing is critical for achieving the proper air-to-fuel ratio and preventing issues like delayed ignition or soot buildup

Using a switch with an incorrect temperature range can lead to safety hazards or frequent nuisance tripping

As the direct updated replacement for the obsolete 312900 model

McDonnell & Miller 318827 O-Ring What furnace brands are compatibleMaintain the integrity of your low water cut offs with the McDonnell & Miller 318827 O Ring. As a veteran technician, you know that a high pressure steam environment demands precise sealing. This square cut O ring, also recognized as Model 69 114, is the standard replacement part for the Series 69 Low Water Cut Off and E 8 level controls. Transitioning from older gasket styles to this new style O ring ensures a tighter, more reliable seal between the