Posted by Harold Kestenholz - Hydronic Network on March 05, 2001 at 19:34:42:
In Reply to: Steam valve recommendation posted by Fritz on March 05, 2001 at 16:50:51:
The major known vents are Gorton and Hoffman.
http://fhs.ittind.com/
http://www.watsonmcdaniel.com/Product%20Info/specialty_products/Air%20Vents.html
http://www.ferguson.com