A New Heat Riser Valve <<  <   >  >> The old heat riser valve was sticking, and the spring didn't work. It was a mess. Surprisingly, new ones are available from LMC that are made in Canada: This article comes from Fix GMC: http://www.fixgmc.com/ The URL for this story is: http://www.fixgmc.com/art65.html Copyright 2008 FixGMC.com. Read our Terms of Use.