Adam August
New Member
The water system for my home is an open system; i.e. no backflow directly after city main connection. I bought the house ~1.5yrs ago; built in the 70's in Oregon.
We had no issues with pressure fluctuation over the first year of ownership.
This summer I installed a sprinkler system and tied in to my water line in my crawlspace. I tied in to the supply line running to my water heater, about 10ft away from the water heater. I tied in to the 3/4" copper line with a sharkbite 3/4" copper to 1" PVC Tee (my sprinkler line is 1" PVC).
I get the obvious pressure drop when my 1" sprinkler line is opened up, but I have had another unexpected occurrence.
My system is building up pressure after sufficient depletion of my water heater tank (i.e. clothes washer, dishwasher, or shower); enough to make my water heater pressure relief valve go off (I replaced the pressure relief valve just to make sure it wasn't bad, didn't help.)
You can also notice the system pressure when running the kitchen faucet, shower, etc.. immediately after the tank has filled and heated up. High pressure for a brief moment, then back to normal again after the excess pressure is released.
I have no idea what could be causing this... I thought maybe my backflow for my sprinkler system wasn't working properly and somehow pressure was building up back in to the home system, but I've had a shutoff valve to the sprinkler system closed for a couple months now and still have the same issue (I also had the sprinkler backflow inspected).
The only thing that is different is there is a Tee running off the copper supply line to a 1"PVC for about 10ft then it hits a (currently) closed shut off valve...
Any help/ideas would be appreciated!
We had no issues with pressure fluctuation over the first year of ownership.
This summer I installed a sprinkler system and tied in to my water line in my crawlspace. I tied in to the supply line running to my water heater, about 10ft away from the water heater. I tied in to the 3/4" copper line with a sharkbite 3/4" copper to 1" PVC Tee (my sprinkler line is 1" PVC).
I get the obvious pressure drop when my 1" sprinkler line is opened up, but I have had another unexpected occurrence.
My system is building up pressure after sufficient depletion of my water heater tank (i.e. clothes washer, dishwasher, or shower); enough to make my water heater pressure relief valve go off (I replaced the pressure relief valve just to make sure it wasn't bad, didn't help.)
You can also notice the system pressure when running the kitchen faucet, shower, etc.. immediately after the tank has filled and heated up. High pressure for a brief moment, then back to normal again after the excess pressure is released.
I have no idea what could be causing this... I thought maybe my backflow for my sprinkler system wasn't working properly and somehow pressure was building up back in to the home system, but I've had a shutoff valve to the sprinkler system closed for a couple months now and still have the same issue (I also had the sprinkler backflow inspected).
The only thing that is different is there is a Tee running off the copper supply line to a 1"PVC for about 10ft then it hits a (currently) closed shut off valve...
Any help/ideas would be appreciated!