Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Plumbing (https://www.askmehelpdesk.com/forumdisplay.php?f=259)
-   -   Knocking sounds after turn off faucet or flush toilet (https://www.askmehelpdesk.com/showthread.php?t=526467)

  • Nov 16, 2010, 12:26 PM
    kenforest
    Knocking sounds after turn off faucet or flush toilet
    My house is ~8 years old (built in 2002) and recently I noticed a strange problem. In the master bedroom, and only in the master bedroom, if immediately after I turn off the faucet rapidly, or immediately after the water tank for toilet fills up, I can hear several knocking sounds from one of the wall. There are probably 4-5 knocking sounds and they fade away. It seems there is no sound if I turn off the faucet slowly, or reduce the water flow to quite slow for the toilet water tank.

    I read online regarding the water hammer, and tried a few times to drain the pipes, i.e. turn off water main, open faucet at lowest point of house, and let the water drain. These trials do not appear solve the problem. At one time, the problem goes away and returns in a hour. At another time, the problem does not go away.

    Any one here has some insight on what's going on? I almost have nighmares about some pipes in the wall burst, or big repair bills.

    Thanks
    Ken
  • Nov 17, 2010, 07:50 AM
    speedball1

    Is it only on the cold water that bangs or does the hot side do the same thing? Back to you, Tom
  • Nov 17, 2010, 02:21 PM
    kenforest
    It happens on either cold or hot water. Thanks Ken
  • Nov 23, 2010, 11:27 AM
    kenforest
    Can anyone give me some answers? Thanks Ken
  • Jul 13, 2011, 11:38 AM
    lai yip
    Pipes knocking loudly after flushing
  • Jul 13, 2011, 01:04 PM
    hkstroud

    Turn off water to house. Open all faucets, flush all toilets. Let water drain completely, if possible let sit for a while so all water drains out of air chambers. Close all faucets, turn on water. Turn on water slowly so that you don't blow out cartridges in single handle valves.

  • All times are GMT -7. The time now is 03:23 PM.