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Posted by george on January 14, 2007 at 07:48:39:
In Reply to: Re: Steam Vents - How long should they last posted by HeatPro on January 13, 2007 at 23:10:00:
I have used a few varivalve in my one
pipe system.
These are adjustable and very expensive.
They work much beter than the old ones in
my house.