McDonnell & Miller 324500 O-Ring Identified as a #48 orifice

Identified as a #48 orifice with a calibrated

and sensors

Using a genuine Armstrong A21825-1 ensures material compatibility with the steam environment

or Broan unit

back out the adjustment screw

McDonnell & Miller 324500 O-Ring Identified as a #48 orificeMaintain precise system pressure and eliminate leak paths with the McDonnell & Miller 324500 Tetraseal O Ring. This pack of five high performance seals is the engineered replacement for the discontinued 324435 part number, ensuring a direct fit without the need for field modifications. Designed as a critical boiler control replacement part, these o rings are specifically optimized for low water cut off (LWCO) and mechanical water feeder assemblies.