Posted by jtown on October 01, 2001 at 07:08:07:
In Reply to: Boiler main cold water valve *Help* posted by Scott on September 30, 2001 at 17:32:15:
If you have a steam boiler open all the valves and watch to see if the water level goes up in the gage glass, you should be familiar with that unless you just moved in. It might have an auto-feeded, a valve with electric hooked to it inline with the cold water feed or a mechanical float chamber as part of the valve. Then all valves stay open unless they are bypass valves for emergencies or maintenance. If you have a water boiler all valves are usually open and you have an auto-fill valve that has a disc shaped chamber that holds a diaphragm to regulate the pressure. It may be combined with a safety valve that dumps excess pressure (water on floor) to protect the boiler. All valves in-line with that should be open.