McDonnell & Miller 324500 O-Ring Common Questions Is this relay

Common Questions Is this relay compatible with other compressor brands

Common Questions & Technical Insights Is the 313900 gasket compatible with the older 312800 part number

While the coil is ruggedly constructed

the switch is defective and needs immediate replacement

a shorter probe may lead to delayed tripping and unsafe heat levels

McDonnell & Miller 324500 O-Ring Common Questions Is this relayMaintain 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.