(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 5 of 5

Thread: Help with an old problem, bowl water drops after refill

  1. #1
    DIY Junior Member dunkinidaho's Avatar
    Join Date
    Aug 2009
    Location
    Michigan, USA
    Posts
    17

    Default Help with an old problem, bowl water drops after refill

    I'm sure this has been covered before, maybe recently. After the tank and bowl refills the water level will drop about 1/2-3/4 inch. Vent problem? siphon problem? or could it just be this cheap Chinese toilet I have.

    thanks

  2. #2
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,685

    Default

    My guess is that it is installed in a tiny powder room and the door is a tight fit without a gap under it. When you close the door it creates an air pressure pulse that pushes water around the bend.

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,412

    Default

    The toilet bowl can only be filled so high (unless it is clogged) before it self-levels at a specific depth. Now, this can take a minute or two after the fill stops. After that time, for it to chance, there has to be some other force, or a leak. A back-to-back toilet that isn't plumbed properly can cause water to affect the toilet opposite it, as can high winds creating pressure waves in the vent system (this can rock the water, causing some to slosh over the weir and lower the level). You can determine the max level by slowly pouring water into the bowl (pouring too fast can make it flush), then letting it sit for a few minutes...that's as high as it ever will sit.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #4
    DIY Junior Member dunkinidaho's Avatar
    Join Date
    Aug 2009
    Location
    Michigan, USA
    Posts
    17

    Default

    Quote Originally Posted by jadnashua View Post
    The toilet bowl can only be filled so high (unless it is clogged) before it self-levels at a specific depth. Now, this can take a minute or two after the fill stops. After that time, for it to chance, there has to be some other force, or a leak. A back-to-back toilet that isn't plumbed properly can cause water to affect the toilet opposite it, as can high winds creating pressure waves in the vent system (this can rock the water, causing some to slosh over the weir and lower the level). You can determine the max level by slowly pouring water into the bowl (pouring too fast can make it flush), then letting it sit for a few minutes...that's as high as it ever will sit.

    Did the test and it looks like the water level is where it's supposed to be. Just seems a bit low to me. Thanks for the help

    Dunkinidaho

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,412

    Default

    The water depth in the bowl varies by design and some of the newer low-flow toilets are pretty low, or, they have a very narrow water spot. This is especially true with dual-flush toilets since they still need to empty the entire bowl whether it is their low or higher volume flush...there just can't be all that much there or it gets diluted, not purged from the bowl.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

Similar Threads

  1. New Toto tank level drops but no leakage into bowl
    By wwleong in forum Toilet Forum discussions
    Replies: 3
    Last Post: 02-13-2012, 06:38 PM
  2. Brine refill problem
    By PatSea in forum Water Softener Forum, problems, installation and reviews
    Replies: 3
    Last Post: 12-23-2010, 06:57 PM
  3. Toilet on boat doesn't refill bowl
    By kbertelsen in forum Toilet Forum discussions
    Replies: 5
    Last Post: 11-20-2007, 11:34 PM
  4. Problem with new well, output pressure drops off
    By ron in sc in forum Pumps and Tanks Well Forum & Blog
    Replies: 16
    Last Post: 03-27-2007, 05:51 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •