Steam Air Valves

Post Reply | Watch this Post

The d valve will have a larger hole than the c valve which will allow the steam to enter the radiator faster than with the c valve. If the old valve was spitting, that is an indication that the valve may need to be replaced, not that you need to change the size of the valve. There is a great article about maintaining steam systems posted on the Old-House Journal website right now...check it out http://www.oldhousejournal.com/magazine/2004/nov/care.shtml