I'm converting my heating system from good old fashion steam heat to radiant heat. In the interim, until I open the ceilings and floors, I'd like to use my old steam radiators for hot water. The research I've done concludes that I can use a single entry valve for the conversion. If you don't know what it is, I didnít, it's a valve that has both the HW input and output running through the one-pipe steam input. I'm trying to put a price on these valves but I'm having trouble locating these on the internet. Anyone have any leads or done this before?