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Re: Water heater valve
I forgot to include this from the IRC. (bold and underlining are mine)
- P2903.4 Thermal expansion. In addition to the required pressure relief valve, an approved device for thermal expansion control shall be installed on any water supply system utilizing storage water heating equipment whenever the building supply pressure exceeds the pressure-reducing valve setting or when any device, such as a pressure-reducing valve, backflow preventer or check valve, is installed that prevents pressure relief through the building supply. The thermal expansion control device shall be sized in accordance with the manufacturer's installation instructions.
I have a difficult time getting plumbing inspectors and building officials to "understand" what "In addition to" and "the required pressure relief valve" means.
It means: 1) You shall have the pressure relief valve, and, 2) you shall have a means to control thermal expansion (i.e., an expansion tank).
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