View Full Version : Quick Pressure Drop

12-14-2008, 06:34 PM
The water pressure in my home is about 80 - 90 psi. I have an expansion tank connected to my electric water heater and I have a watts pressure reducer after the water meter. When I open a faucet, the water runs normally for about 5 seconds and then you notice the water pressure change and decrease. I look at my water pressure gauge and the water pressure is reading 20 psi. Is it normal for water pressure to drop so much with just opening one faucet?

12-14-2008, 07:05 PM
No it is not. Does your PRV have a strainer on it?

12-14-2008, 07:13 PM
I dont know. This prv came with the house and we've been in it for over 2 years now. The prv only has a pipe on each end.

12-14-2008, 07:25 PM
Shouldn't these two threads be merged as oneż I mean we are talking about the same plumbing problem.

12-14-2008, 07:37 PM
Based on the Diagram, can I easily remove that strainer plug gasket?

If I remove that, what should I be looking for?

Gary Swart
12-14-2008, 08:33 PM
Likely some debris. Clean it and replace it. I read and answered your first post before seeing this one, so my answer here is just a tad different. Check the strainer.

12-15-2008, 12:05 PM
More likely the PRV is defective and needs replacement.