SGkent
Thank You
I asked other questions on PRV's before but this is a new question directed at folks who install and who have them. The PRV in question is a Zurn / Wilkins model 70. The outside pressure is about 80 - 85 PSI. The PRV is now set to 70. When a large flow is initiated, like the washing machine, or the irrigation system, the pressure falls from 70 to about 45 - 50 then as the PRV acts to regulate it, it rises upwards to the fall off pressure - say 55 - 60 PSI. Last time the valve was rebuilt was about 3 years ago. I still have plenty of rebuild kits but I like to save them for when the PRV really fails. Is the wild swing normal under a large sudden demand like the washing machine or irrigation? I would think the PRV should react quicker but this is the only one I have ever monitored. Usually when the springs rot away they fail in the open position. I am having trouble understanding why the pressure falls so far and so fast, then recovers. Is it possible there is a city water device acting up in my line near the meter?