Posted by Harold Kestenholz - Hydronic Network on March 06, 2001 at 09:16:33:
In Reply to: draining hot water system posted by mike wood on March 06, 2001 at 05:05:48:
Boiler drain cocks are usually at the lowest part of the boiler casting. Their location is specific to the model that you have and you did not state that model, not that everyone will know where that specific location is on all models over 50 years.
You can email or call Weil-McLain to get the specific answer from their representatives.
http://www.weil-mclain.com/
You can find where the valves are generally in the drawings at
http://www.hydronic.net
Each system is custom built for the building; they do not come prebuilt to the house. A plumber decides where to put valves based on preference, engineer recommendations and experience.