Return to the Plumbing Forum | Post a Follow-Up

 o
Diagnosing Vibrating Pipes after Flushing Toilets

Posted by joelq (My Page) on
Thu, Nov 22, 07 at 10:32

Hi all - I've been trying to diagnose for over a week now an issue with vibrating pipes while a toilet re-fills after a flush. The vibration doesn't last the entire time the toilet is filling - starts a couple seconds into it, and stops a few seconds before the tank is full.

We have a total of four toilets around the house, and all four cause post-flush :-) vibration to some degree. Our water is supplied by the city, if that matters. The house is about 6 years old, and the toilets and plumbing are all original.

- I've read that these things are usually caused by a failing ballcock, so I've actually replaced the ballcocks in two of the four toilets with Fluidmaster ones, but still have the problem.

- Instead of replacing the ballcocks in the other two toilets, I shut-off the their respective water supply valves to see if the problem went away. It didn't. QUESTION: Was this a valid test, and can I eliminate the ballcocks in those two toilets as the culprit?

- Assuming I eliminate all four toilets as problematic (by either replacing their ballcocks, or shutting off their water supply valves), can there be something else that could be causing this? Could it be a leaky faucet? I don't have any that I've noticed. Could it basically be anything that's attached to the cold water plumbing (water heater?, dishwasher?), even though they are not currently taking any water?

I'd very much appreciate any other pointers in diagnosing the problem. Unfortunately, since the vibrations only last for a few seconds, it's tough to do a series of tests while the vibrations are happening.

Thanks!

-


Follow-Up Postings:

 o
RE: Diagnosing Vibrating Pipes after Flushing Toilets

Do you have a pressure regulator on the main supply line near where it enters the house? Sometimes they will vibrate/pulse at low flow rates. Check there for the vibration. Replace if necessary.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Plumbing Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here