McDonnell & Miller 63 Low Water Cut Off Els PW 17895 What size regulators does this

What size regulators does this fit

The most common symptoms include the boiler lighting for a few seconds and then shutting down

Repeated tripping of an L255F-30 limit switch is typically indicative of restricted airflow

Can I use a pressure switch with a different WC rating if it looks the same

allowing for the higher 400 PSI pressure rating at 100°F compared to standard lightweight models

McDonnell & Miller 63 Low Water Cut Off Els PW 17895 What size regulators does thisThe McDonnell & Miller 63 Low Water Cut Off (Part Number 142400) is a heavy duty, float operated safety control designed for residential, commercial, and industrial boiler applications. This mechanical LWCO is specifically engineered for use with both hot water and steam boilers, providing a critical layer of protection against dry fire conditions. Featuring a 1" NPT threaded connection for equalizing pipes, it is rated for a maximum boiler pressure