Machine Gun Shower

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by dachd, Jun 17, 2011.

  1. dachd

    dachd New Member

    Messages:
    23
    Location:
    Arkansas
    Hello,

    I live in a ranch house on a slab (NW AR), when the shower in the bathroom @ one end of the house is used, you can distinctly hear a rapid tapping/banging in the pipes @ the other end of the house. At first I thought it was a leaky diverter spout valve, so I removed the spout and capped the pipe that the spout was connected to.

    The noise still occurs, so I'm stumped. Could it be the mixing valve? Any other ideas?


    Thanks,
    Dave
  2. LLigetfa

    LLigetfa DIYer, not in the trades

    Messages:
    3,988
    Location:
    NW Ontario, Canada
    Does the house have a pressure regulator? Those are known to make a hammer drill like noise.
  3. dachd

    dachd New Member

    Messages:
    23
    Location:
    Arkansas
    Actually, the pipe tapping/banging sound is more like a slow jackhammer, somewhere between a handheld jackhammer (street worker) and a jackhammer attachment on a large track/backhoe. Definitely pipes at the other end of the house from the shower getting shaken. :)
  4. dachd

    dachd New Member

    Messages:
    23
    Location:
    Arkansas
    I don't think there's a pressure reg, and only one of the two showers in the house does it, no other problems with pipe noise in the house.
  5. cwhyu2

    cwhyu2 Consultant

    Messages:
    1,347
    Location:
    Cincinnati OH
    If it is a two handle faucet it may have a loose washer.They will make that noise.
  6. dachd

    dachd New Member

    Messages:
    23
    Location:
    Arkansas

    Sorry, I should have specified, it's a single handle, and it's probably under 10 years old (if that means anything).
  7. cwhyu2

    cwhyu2 Consultant

    Messages:
    1,347
    Location:
    Cincinnati OH
    Can you tell me what brand and if it is a pressure balance faucet,anti scald type?
    Can you send a picture?
  8. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,142
    Location:
    Houston, TX
    If you are on your own water well then You might want to check your water tank, and make sure it is not water logged.

    That could be the problem that you describe.

    Have a good day.


    DonL
  9. dachd

    dachd New Member

    Messages:
    23
    Location:
    Arkansas
    Thanks DonL, we're on city water.
  10. dachd

    dachd New Member

    Messages:
    23
    Location:
    Arkansas
    I'm pretty sure it's a no-name brand (cheap builder stuff?), and yes it is an anti scald pb type....I'll try to post pics later today or tomorrow.
  11. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,142
    Location:
    Houston, TX
    If you are on a city system, and do not have a regulator, Then it would be best to install one.

    That may fix it.

    DonL
  12. DanT

    DanT New Member

    Messages:
    19
    Location:
    ohio
    the house we moved into last year had a noise when we would run water. turned out to be the water meter. the guy that changed it said he had changed a lot of them.
  13. dachd

    dachd New Member

    Messages:
    23
    Location:
    Arkansas
    Okay,

    Here's an update. I took pictures, both without & with the cover. There doesn't seem to be a brand name on the thing. Here are links to the pics:

    dachd_2068.jpg

    dhchd_2069.jpg

    dhchd_2070.jpg

    Also, you may notice in one pic that the temperature is turned up the whole way on the pb valve...don't know if that has anything to do with it. I turned it down a little, and the water still gets hot enough, but may not come winter. Also, ran the shower for 5 min or so, and there was no noise....I'll monitor over the next couple days or so and see how it goes.

    Also, I did a little more research:
    -There is a pressure regulator near the indoor shutoff.
    -There is no access panel to the shower plumbing.
    -I attached a watts pressure guage to an outdoor spigot, it read 80#
    Last edited by a moderator: Jun 17, 2011
  14. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,142
    Location:
    Houston, TX
    I would lower the pressure to 60 psi.

    Sounds like you made progress.


    DonL
    Last edited: Jun 17, 2011
  15. cwhyu2

    cwhyu2 Consultant

    Messages:
    1,347
    Location:
    Cincinnati OH
    That is a Price Phister it has the same cartrage as a Delta.
    Replace the cartrage, the balancing spool is the probable cause of the noise.
  16. LLigetfa

    LLigetfa DIYer, not in the trades

    Messages:
    3,988
    Location:
    NW Ontario, Canada
    Check the pressure inside the house before messing with the regulator. Outside hose bibs are often plumbed before the regulator.

    A regulator can develop oscillations at specific resonant flow rates and anything you do to retune it could stop them most of the time. WIth a regulator, you have a closed system and as such should have an expansion tank somewhere. The expansion tank should work as a damper to reduce the oscillations but it could also amplify them under certain conditions.

    I had a friend living in a trailer court and the neighbor's regulator would cause his pipes to rattle so he installed a small expansion tank to stop it.
  17. dachd

    dachd New Member

    Messages:
    23
    Location:
    Arkansas
    How do I remove the cartridge, and how do I know which one to buy? Do I need any special tools?
  18. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,015
    Location:
    New England
    That disk is no more than a limit stop. These, in one form or another, are on all new shower valves to set the max temperature that can be achieved on the outlet. It's a good idea to set it so someone doesn't accidentally bump the handle and then scald themselves. Hassle is, it may need to be changed winter to summer to account for the incoming cold water temperature, so few people do it. This is more important if you run your WH at a high temp without a tempering valve.
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