All of a Sudden - Water Hammer?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Milanomike, Jun 1, 2014.

  1. Milanomike

    Milanomike New Member

    Messages:
    26
    Location:
    Ohio
    Hi,

    Left the house yesterday morning, all was well, daughter at home said no issues. I returned about 10 pm, flushed the main floor toilet and pipes started banging like I've never heard before. I think, but not sure yet, main floor toilet is most of the issue (Toto Drake).

    Contractors are outside are installing new fiber optic cable in neighborhood, hard to see how this is related, but wanted to mention.

    No changes to plumbing system other than new hot water heater ~3 months back.

    Checked pressure at basement sink, have the 60 psi, assuming pressure regulator is good. Also, have an expansion tank at hot water heater (not new) but I think if it failed my pressure relief valve at hot water tank might seep.

    Should I turn the water off and let system drain after opening all valves, flushing toilets? Never had an issue in 18 years at this house, house is entirely plumbed with copper pipe, etc.

    Thanks for any input.

    Mike
  2. Reach4

    Reach4 Well-Known Member

    Messages:
    2,810
    Location:
    IL
    Is the water hammer a single bang when the toilet fill shuts off, or something else?
  3. Milanomike

    Milanomike New Member

    Messages:
    26
    Location:
    Ohio
    No, not a single bang, a series of violent sounding bangs for some seconds. Thanks.
  4. Smooky

    Smooky Member

    Messages:
    652
    Location:
    NC
    Last edited: Jun 1, 2014
  5. Milanomike

    Milanomike New Member

    Messages:
    26
    Location:
    Ohio
    OK, also does the hammering with the toilet in the master bath. What the heck is going on here. I'll drain system later today and see what happens. What do you mean by angle stops? Thanks.
  6. Reach4

    Reach4 Well-Known Member

    Messages:
    2,810
    Location:
    IL
    I think he means the right-angle valve for shutting off water to the toilet.

    If only that toilet makes the chattering, I would replace that 18 year old fill valve.
  7. Milanomike

    Milanomike New Member

    Messages:
    26
    Location:
    Ohio
    OK, turned water off to the Toto, and flushed toilet, all is quiet, went upstairs and flushed master bath toilet, all is quiet. I'm thinking I need a new fill valve or something in the Toto? Reading that Lowes has these. Make sense?
  8. Milanomike

    Milanomike New Member

    Messages:
    26
    Location:
    Ohio
    Just looked it up, the Toto is 9 years old
  9. Reach4

    Reach4 Well-Known Member

    Messages:
    2,810
    Location:
    IL
  10. Milanomike

    Milanomike New Member

    Messages:
    26
    Location:
    Ohio
    Thanks for the info, took it apart and Lowes did not have replaceable top, but HD did. Also noted my flapper was shot. New stuff installed, need to wait for wife to stop running water to see if my 11 bucks fixed the problem. Thanks for all the help.
  11. Milanomike

    Milanomike New Member

    Messages:
    26
    Location:
    Ohio
    OK, all is well, did not know a defective fill valve could make pipes hammer like that. Thanks for the help looks like I'm good to go on this issue. Mike
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