Posted by Harold Kestenholz - Hydronic Network on November 01, 2001 at 08:08:03:
In Reply to: Re: Strange Steam heating setup posted by tom s on October 31, 2001 at 17:56:00:
That valve on the end of the baseboard is not a pressure valve, but an air vent. The fact that the vent is at the end of the baseboard causes early failure. A vent on a main line should be 18-inches from the end of the main to prevent the main vent from being slammed with a slug of water. The same precaution needs to be applied with the vent at the end of the baseboard; it will receive slugs of water either plugging it shut or breaking it to always be open. The vent should be 6-inches inward from the end or more. A slow vent woould help.