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High pressure

2K views 1 reply 2 participants last post by  Ron The Plumber 
#1 ·
The house is on city water which normal pressure 50 psi. This is a new hook up, one year ago. When home is left for the weekend there is high pressure built up 125 psi. Once a valve is turn on all back to normal pressure. Some one told us there could have been a check valve put on by the city or on the city meter and the hot water tank now builds high pressure. Is this true? What's the correct fix? bjr23
 
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