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

What size regulators does this fit

Featuring a 3/8" NPT connection and a robust brass body

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

sold separately

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