In This video I go over how to maintain a steam boiler with a McDonald #67 low-water cut off. I show how to properly drain to flush out this low-water cut off with float
inside. I also show other important things that require cleaning on a steam boiler. Parts like the site glass, the pigtail which protects the pressure gauge. Make sure on every steam boiler that these things are serviced weather is this McDonald’s 67 style float type LWCO with probe.