If you have a steam boiler you’re also going to have a pressuretrol. I’ve always liked that word because it’s a marriage of the words pressure and control, both of which have much to do with our older steam-heating systems.
Pressuretrols don’t come with screwdrivers, but most contractors already have their own screwdrivers, so that’s okay. The problem, however, is that most of those screwdrivers turn in only one direction: clockwise. And that’s why so many steam-heating systems are operating at a pressure that’s much too high. My advice is to get a counterclockwise screw-driver, which allows you to turn down the pressure. It costs the same as the other type.