tbdub
New Member
I have a PRV in a separate meter pit out by the road next to my 3/4" water meter pit. I live in a rural area and this is common practice out here. The pressure in the water main is well over 80 psi so we have a PRV.
I have 1-1/2" PVC run to my house, which is about 250 ft away. Inside the house i reduce to 1" CPVC and have a pressure guage mounted near the building control valve.
the gauge read about 50 psi, which isn't bad but i wanted to set it at 60. I went to the road and had my wife watch the gauge while i adjusted the PRV. I opened the cold water on a LAV. I adjusted the bolt and she told me the pressure got up to 100 psi. i turned it the other way and got it down to 60. I came back up to the house and turned the LAV off....the gauge now read 75 psi...
what gives? A couples of things got me here.
1. why was i able to get over 75 psi out of the PRV? i believe mine is a WATTS 25AUB-Z3 which says limit is 75.
2. why did the LAV being open drop the pressure 15 psi? Shouldn't the PRV regulate dynamic pressure AND static pressure? I understand friction loss from the road could be a factor, but its 1-1/2" PVC which shouldnt have much friction loss in 250'.
I have 1-1/2" PVC run to my house, which is about 250 ft away. Inside the house i reduce to 1" CPVC and have a pressure guage mounted near the building control valve.
the gauge read about 50 psi, which isn't bad but i wanted to set it at 60. I went to the road and had my wife watch the gauge while i adjusted the PRV. I opened the cold water on a LAV. I adjusted the bolt and she told me the pressure got up to 100 psi. i turned it the other way and got it down to 60. I came back up to the house and turned the LAV off....the gauge now read 75 psi...
what gives? A couples of things got me here.
1. why was i able to get over 75 psi out of the PRV? i believe mine is a WATTS 25AUB-Z3 which says limit is 75.
2. why did the LAV being open drop the pressure 15 psi? Shouldn't the PRV regulate dynamic pressure AND static pressure? I understand friction loss from the road could be a factor, but its 1-1/2" PVC which shouldnt have much friction loss in 250'.