I have a Zurn 3/4" NR3XL pressure reducing valve. I set the static pressure at 50 or whatever and it slowly creeps up to the low 70s. This happens even when I set the static pressure to much lower settings. Operating pressure definitely is affected by the lower settings so I'm thinking the pressure reducing valve is somehow defective. I'm not a plumber (obviously!) and was wondering if this is a symptom that is familiar to the professionals here? It's a three year old home so the valve is less than 4 years old. Thanks.
Static Water Pressure Creeping Up
- Thread starter Kabra
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Incoming is low 70s which I would think is ok but no guarantees that's where it's always going to be. Having one seems like cheap insurance. I saw those kits you're referring to when I was googling and a brand new valve is about $20 more. It seems pretty obvious the regulator is the problem so thinking about just going to Home Depot and getting one. Only $73 and looks really simple to replace.
If it is easy to swap, then good. I was suspecting that the rebuild would be easier. Your pipes may be fairly flexible.
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Do you have a hose spigot that you could put a pressure gauge on to watch? Also, are there water towers in your area? Those tend to smooth out the water pressure.
Make sure this pressure rise occurs even when the WH is on "vacation" setting or off.
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Do you have a hose spigot that you could put a pressure gauge on to watch? Also, are there water towers in your area? Those tend to smooth out the water pressure.
Make sure this pressure rise occurs even when the WH is on "vacation" setting or off.
Fitter30
Well-Known Member
Is there a expansion tank on the water heater and have you checked its setup pressure? Water entering at 50° warming to 75° there will be some expansion. Crack a valve with supply shut off measure the amount that drops the pressure back to baseline. How many ounces?
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That's a really good point and there isn't one on my system. As I mentioned, the new pressure regulator completely solved my problem but an expansion tank still may be a good idea. I'll try the test that you described. Having the in-line pressure gauge that I installed with the new regulator might give me some new insights being able to observe pressure on a regular basis. Thanks for the tip.
Check the pressure gauge 10 minutes after a hot shower, and then you stop using water. Or take a movie of the gauge while you take a hot shower. Don't flush the toilet right after your shower, because that would relieve pressure.
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