Re: water pressure
Posted by CM on January 22, 19101 at 13:59:15:
In response to Re: water pressure
Thermal expansion. If the water got warmer after you closed the valve, it would expand, with a corresponding increase in pressure (as long as you have no leaks and did not open any faucets). In a closed system, it takes very little expansion to raise the pressure significantly.

: This one has really got me puzzled. I shut off the water to the house I have The water pressure regulator comes first then the shut off valve then my pressure gauge comes next.The pressure guage went from 55 lbs to 100lbs this with the water shut off?????? What can cause the pressure to go up? Tom

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