Quote:
Originally Posted by Berwin
Why do water heaters in Florida homes have expansion tanks?
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Because the water meter has a valve that blocks reverse flow, so when the water heater heats up the water, it expands and the pressure in the house plumbing goes up, to the point where damage could occur. The expansion tank provides a cushion of air so the pressure spikes are much lower, and as previously noted these are required by code.
On a side note, expansion tanks last 5 to 7 years, and the simple test is to tap on the tank, below the weld line it should be dull sound, above the weld line it should be more like a bell.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV.
