1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Noisy PRV

Discussion in 'Plumbing and Central Heating' started by EddyP, 28 Oct 2015.

  1. EddyP

    EddyP

    Joined:
    7 Feb 2008
    Messages:
    160
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi,

    When we moved into our house we found that the water pressure was ridiculously high, it meant hozelock fittings wouldn't stay on hoses, the shower was lethal and there was a bit of water hammering.
    I fitted a Honeywell PRV to the 28mm pipe right next to the incoming stop cock, this sorted msot of the problems but we are left with a system that's quite noisy, when ever something is using water there's a pssssssss noise from the PRV, like the water is just being forced through a small hole and the velocity is too high through it.
    Is this normal? I thought PRVs were fairly silent in their operation.

    I'd really like to improve it as the PRV is in the kitchen and it's quite intrusive as it's right by the dining table!

    Thanks

    Ed.
     
  2. Sponsored Links
  3. Agile

    Agile

    Joined:
    26 Jun 2004
    Messages:
    64,017
    Thanks Received:
    4,591
    Location:
    London
    Country:
    United Kingdom
    All I can suggest is that you encase it with something to reduce the sound.

    May need to include some of the pipe too.

    Funny place by the dining table!

    Tony
     
  4. simond

    simond

    Joined:
    26 Oct 2004
    Messages:
    5,232
    Thanks Received:
    465
    Location:
    Surrey
    Country:
    United Kingdom
    Did you fit a large bore PRV (eg: 22mm upwards)?
     
  5. Servotech

    Servotech

    Joined:
    19 Nov 2009
    Messages:
    370
    Thanks Received:
    50
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    It sounds like the PRV is restricting the rate of flow not the pressure.
    Have you any valves surrounding it that have been partially closed off ?
    What have you set the PRV too?
    servotech,
     
  6. EddyP

    EddyP

    Joined:
    7 Feb 2008
    Messages:
    160
    Thanks Received:
    0
    Country:
    United Kingdom
    Thanks for your replies.

    It's a Honeywell 22mm valve, installed horizontally.
    All valves are fully open.

    The pressure is set to 3.5 bar, before I reduced the pressure I think it was about 6 bar, maybe 7.
     
  7. Sponsored Links
  8. Servotech

    Servotech

    Joined:
    19 Nov 2009
    Messages:
    370
    Thanks Received:
    50
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    The large plastic dome on the PRV will unscrew to reveal a filter and there could be something in this.
    Failing this I would take it back to your supplier and swop it for another one (you just need to change the dome).
    Don't forget to turn the water off first!!
    Servotech,
     
  9. EddyP

    EddyP

    Joined:
    7 Feb 2008
    Messages:
    160
    Thanks Received:
    0
    Country:
    United Kingdom
    So they should be quiet then?
     
  10. Agile

    Agile

    Joined:
    26 Jun 2004
    Messages:
    64,017
    Thanks Received:
    4,591
    Location:
    London
    Country:
    United Kingdom
    I have to say that in my experience they all make some noise.

    Since we don't have a scientific noise measurement in dB here we don't know if yours is normal or unusually noisy.

    Tony
     
  11. Servotech

    Servotech

    Joined:
    19 Nov 2009
    Messages:
    370
    Thanks Received:
    50
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    Yes the one's I've come across don't emit any noise.
    A treble bump when taps are turned off was cured by changing the dome head of the PRV.
    As I stated above the noise you described is more like something restricting the flow of water and not reducing the water pressure.
    Is the stop tap below fully turned on?
    servotech,
     
  12. EddyP

    EddyP

    Joined:
    7 Feb 2008
    Messages:
    160
    Thanks Received:
    0
    Country:
    United Kingdom
    Yes its fully turned on.

    I picked up another one yesterday so will try swapping it out today and see what happens.
     
  13. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page