Variation in city water pressure?

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Old 08-29-09, 05:37 PM
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Variation in city water pressure?

I recently installed a pressure gauge on our city water supply (just after the meter). Interestingly, it varies over a minute or so (without any water demand in our house).

Most typically, it will vary from, say, 50-55psi (within a minute or so). I've seen it vary down to 40 and back up to almost 60 within a minute.

I'm not really worried about this, but I'm wondering what is going on? We live about a mile from the water plant and the city's elevated water tank. This pressure variation goes on pretty much continuously (no fires going on!). There should be no lawn sprinkling going on anywhere in the city (too much rain). Strange.

Any comments would be welcome.
Doug
 
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Old 08-30-09, 04:08 AM
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Could it be the gauge?

I have city water and live on top of a tall hill. My pressure averages 20-30psi although occasionally it will get as high as 50-60 and at times quit altogether depending on usage by other water customers. I have one of those pressure gauges that you screw on a hose bib but have never noticed the pressure changing minute by minute. My house is approx 400' from the meter and a lot higher.
 
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Old 08-30-09, 12:15 PM
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Water Pressure

Municipal water system pressures vary with usage, if you check them around 5:00 PM you can see a large drop due to people returning home from work and jumping into the shower.
 
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