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Water hammer problems.

Discussion in 'General Discussion' started by saitrix, 23 Sep 2009.

  1. saitrix

    Sgarrista

    Joined: 2 Jun 2003

    Posts: 8,944

    Location: Loughborough

    Hi,

    We are having a few problems with water hammer in my house. When a tap/toilet/etc stops suddenly you get water hammer for a few seconds afterwards. I have heard about being able to fit things to prevent it, does anyone have any experience with this?
     
  2. antijoke

    Caporegime

    Joined: 28 Jan 2003

    Posts: 38,582

    Location: Stratford-Upon-Avon

    I have no idea what you are going on about.
     
  3. Mat

    Capodecina

    Joined: 18 Oct 2002

    Posts: 13,928

    Air lock in the pipes?
     
  4. AtlanticP

    Wise Guy

    Joined: 3 Mar 2008

    Posts: 1,629

    Location: Cornwall

    Air in the pipes mate, its vibrating on joists etc. Bleed that water system. Job Done :)
     
  5. brummie

    Mobster

    Joined: 3 Feb 2003

    Posts: 2,848

    Location: Shropshire

    i had a similar problem. Plumber turned down the stop **** so not as much pressure and it went away. :)
     
  6. saitrix

    Sgarrista

    Joined: 2 Jun 2003

    Posts: 8,944

    Location: Loughborough

    Tried lowering the pressure of the system, no change. Hmm may have to try bleeding next then.
     
  7. Beans on toast Dave

    Mobster

    Joined: 27 Mar 2004

    Posts: 4,304

    Location: Telford

  8. Participant

    Caporegime

    Joined: 13 May 2003

    Posts: 31,823

    Location: Warwickshire

    Hot or cold taps, or both?

    Do you have any pumps installed for the water system?
     
  9. saitrix

    Sgarrista

    Joined: 2 Jun 2003

    Posts: 8,944

    Location: Loughborough

    Both hot and cold.

    There is a pump installed for one of the showers in the house.
     
  10. Participant

    Caporegime

    Joined: 13 May 2003

    Posts: 31,823

    Location: Warwickshire

    Check / renew if necessary, the valve on your cold water storage tank.

    Check / renew if necessary, the washers and ball valves on your toilet cistern.
     
  11. saitrix

    Sgarrista

    Joined: 2 Jun 2003

    Posts: 8,944

    Location: Loughborough

    Thanks, will look into that. :)
     
  12. St0rmer66

    Mobster

    Joined: 31 Oct 2004

    Posts: 4,550

    Location: Harrogate, North Yorks

    Don't try this if you have a combi boiler though (not that you'd be able to, you'd just get wet trying).

    Usually it is just an airlock, but if it persists you may have a dead leg of pipe somewhere (a bit of unused pipe which has been capped off/isolated but still joined onto the water pipes) with air trapped in it somewhere.

    The thing you heard about fitting is a mini expansion vessel. Imagine a balloon (which fills with the water) surrounded by a pocket of air which is under pressure. When you turn the tap off, the pressure will expand the balloon into the air instead of having nowhere to go and causing the water hammer.

    Start with trying to clear the air out first though..
     
  13. Flare

    Mobster

    Joined: 2 Jan 2009

    Posts: 3,549

    Location: Manchester

    is this when water pretty much explodes out of you tap? :p
     
  14. RadoX

    Wise Guy

    Joined: 24 Oct 2006

    Posts: 1,752

    Location: Sheffield

    more to the point whos sig have you stolen there :d
     
  15. saitrix

    Sgarrista

    Joined: 2 Jun 2003

    Posts: 8,944

    Location: Loughborough

    No ones, it is my previous car. :)

    Edit - Whoops ignore me, being a bit stupid there. :p
     
  16. Participant

    Caporegime

    Joined: 13 May 2003

    Posts: 31,823

    Location: Warwickshire

    Can't remember his name at the moment, maybe someone else knows.
     
  17. -TNT-

    Gangster

    Joined: 29 May 2003

    Posts: 318

    Location: Bristol

    wow nice golf!
     
  18. ThriceNightly

    Wise Guy

    Joined: 30 Nov 2003

    Posts: 2,251

    what he said ^^^

    also can be caused by a faulty mains water stopvalve on the rising main.
     
  19. RadoX

    Wise Guy

    Joined: 24 Oct 2006

    Posts: 1,752

    Location: Sheffield

    haha :D
     
  20. Ricochet J

    Capodecina

    Joined: 29 Jun 2004

    Posts: 12,895

    Answer this as honestly as you can: why did you reply in the thread then? :confused: