Re: water heater plumbing
Posted by dick on July 31, 19100 at 10:22:15:
In response to Re: water heater plumbing
This sounds like a convection loop. I'm assuming that this tank has an additional pop off valve that you didn't mention. I would replace the tank and replumb it exactly like it is. The new heater will be more efficient than you r old one and cheaper to operate. The convection loop does add a little to the operating costs but not that much if the line is insulated all the way.

: I would like to replace my 25 yo water heater, but I'm unsure of the plumbing. In addition to the cold water supply and the hot water outlet at the top of my existing gas storage heater, there is an additional pipe exiting what should be the drain at the bottom, which appears to form a loop connecting to the other hot water line at the most distant sink. I suspect that this is some sort of convection loop. Should I simply maintain this configuaration with the new (also conventional) heater, or is there a reason to change it. I am interested in achieving as much energy efficiency as possible. Is this a job that an average home handyman can do?

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