PRV Factory set to 3 bar, but keeps increasing

Discussion in 'Plumbers' Talk' started by Inside and out, Apr 13, 2015.

  1. Inside and out

    Inside and out New Member

    Hi,

    I had to replace this PRV today as the pressure was off the scale. I fitted the new one and it was showing 2.5 bar....but by the evening it had risen to 6 bar. How can this happen? I have not touched the adjuster, I want it to stay at 3. Any thoughts? I cant keep taking it back to the shop!!

    Thank you
     
    Inside and out, Apr 13, 2015
    #1
  2. Deleted member 33931

    Deleted member 33931 Guest

    Why do women purse their lips when taking selfies?

    Soz - can't help your other question... :oops:
     
    Deleted member 33931, Apr 13, 2015
    #2
  3. Dave does Gas

    Dave does Gas Screwfix Select

    Is it the boiler or unvented cylinder
     
    Dave does Gas, Apr 13, 2015
    #3
  4. Inside and out

    Inside and out New Member

    I use it to manage the water pressure to the hot water heater - which is a sealed tank.
     
    Inside and out, Apr 14, 2015
    #4
  5. Inside and out

    Inside and out New Member

    I have checked today that the PRV is suitable for the incoming pressure (up to 16 bar). I have cleaned it, and it is reading 3 bar again. It seems that the pressure increases in the evening - This is for a apartment in a block of flats, I wonder if this make an impact?
     
    Inside and out, Apr 14, 2015
    #5
  6. Dave does Gas

    Dave does Gas Screwfix Select

    Still not clear what bit of kits its the PRV for can you post a photo of it in its place.
     
    Dave does Gas, Apr 14, 2015
    #6
  7. plumber-boy

    plumber-boy Well-Known Member

    Sounds like a cheap PRV that doesn't work properly to me.:eek:
     
    plumber-boy, Apr 14, 2015
    #7
  8. Dave does Gas

    Dave does Gas Screwfix Select

    Is it adjustable? If so sounds as though it needs setting up to the pressure you want.
     
    Dave does Gas, Apr 14, 2015
    #8
  9. Dave does Gas

    Dave does Gas Screwfix Select

    Possible PB, but as a rule there not a cheap bit of kit :confused:
     
    Dave does Gas, Apr 14, 2015
    #9
  10. plumber-boy

    plumber-boy Well-Known Member

    Screwfix do a cheap one and it's shoite.;)
     
    plumber-boy, Apr 14, 2015
    #10
  11. heatyman

    heatyman Well-Known Member

    Where is the connection for the pressure gauge?
    If it is after thevalve and before the cylinder, then as the cylinder heats up and the pressure increases. When the gauge is reading high, turn a hot tap, let it run for a couple of minutes, and does the pressure drop? You may not have a problem. Whilst new, these items are fairly reliable.
     
    heatyman, Apr 14, 2015
    #11
  12. G&W Plumbing & Heating

    G&W Plumbing & Heating Active Member

    You may not have balanced supplies, it depends where the valve is,
     
    G&W Plumbing & Heating, Apr 17, 2015
    #12

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