Plumbing pressure relief
I'm running on internal water (not city water). I don't leave the water heater turned on all the time (too wasteful to do so) and when I turn it on it raises the pressure in the whole plumbing system ...
Forum Discussion
mobeewan wrote:Yes especially in hill country where city pressure is 150+ and the home will have a pressure reducing regulator that effectively creates a closed system. The days of the city maintaining 50 psi and the meter flows both ways does not apply to everything anymore.
Accumulator tanks are now required at the hot water outlet pipe of water heaters on residential construction and when replacing WHs in existing homes. This is to counter the expansion of heated water in the WH and hot water lines and prevent unnecessary cycling of the WH relief valves.
My local water company required a backflow device a couple decades ago. I started having slab leaks until the accumulators were installed. 2x 100 gallon water heaters with no air pocket can expand quite a bit.
The RV water inlet has a check valve that creates the same closed system conditions.
