There is no special solder for copper. Use 50/50 and acid flux (or whatever you get for plumbing). Make sure the tank is empty and dry and the hose connections are not connected. If the hole is small enough then only solder is needed but if lager then a piece on sheet copper is needed to patch.
Posted on Sep 24, 2011, 8:04 PM from IP address 18.104.22.168