- #1
bbrady
- 2
- 0
I was measuring the water pressure on my house using a pressure gauge with a hose bib fitting. So I screwed it on and the meter read 120psi. Then I started turning the valve off and the pressure decreased the more I closed the valve. There was no flow downstream of the valve (or anywhere upstream). I don't understand the physics of this. Why would the pressure decrease just by closing the valve?