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Question DetailsAsked on 2/23/2016

How Much it will Cost to change water pressure regulator valve?

What is the normal cost for replacing the water pressure regulator valve. Looks like the valve itself is less than $100.

We are getting knocking sound when we close the faucet or when the flush completes the filling.

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If logged in, you can see a number of prior similar question links which have answers below this question - more links under them - generally about $75-150 minimum searvice charge if readily accessible location AND the main shutoff valve works right to allow shutting off the water.


However, have you (using about $10-15 hose-threaded gage on hose bib) checked that high pressure is actually your problem - should generally be 30-35 psi or higher for convenience and good shower flow, generally not over about 45-50 psi and definitely not over 70.


Could be your pressure is OK but you are getting water hammer anyway, so you need water hammer surge arrestors (or equivalent pipe stickup at faucets, which actually works as well or better and much more reliable), or you may have them and just need to drain down the water in the pipes to refill them with air, as the air gets absorbed into the water over time. Generally, while it does not occur usually at low pressures, high water pressure is not the main cause of water hammer - it is the piping configuration and lack of shock absorbing features in the piping that cause it - so substandard installation is the primary cause.


Also, some pressure regulators are adjustable - you might just be able to adjust the pressure setting if it is running high, because pressure regulators generally tend to lose spring tone and start letting the presure rise as they get older.

Answered 3 years ago by LCD




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