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tommyo
10-11-2009, 08:04 AM
I have a small leak above one zone valve, (2 are on system) I am assuming this has to drained before any attempt to solder(suggestions) will this do anything to the zone valve ?, and should I use map gas or propane seeng as when doing this. When drained and refilling is ther anything else I should be cautious about, and how would I bleed air after completion, thanks for any advice.

Peter Griffin
10-11-2009, 08:17 AM
Yes, water needs to be drained
Yes too much heat will damage the valve