(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 8 of 8

Thread: Kohler fills every 25 minutes -- is a bad flapper to blame?

  1. #1
    DIY Junior Member rafael's Avatar
    Join Date
    Apr 2010
    Location
    SF
    Posts
    18

    Default Kohler fills every 25 minutes -- is a bad flapper to blame?

    Hey all,

    For the past few weeks, my Kohler toilet fills every 25 minutes or so, and stays on for about 15 seconds. I did some online searches, and the consensus seems to be that the problem is the result of a bad flapper.

    I turned off the shuttoff valve, and inspected the flapper, and it still looks good to me. It says "Coast Foundry Made in USA" on it. Is there any way for me to know ahead of time if this problem is the result of the flapper being bad, or should I just go ahead and replace it?

    If I should replace it, can anyone point me to a tutorial?

    Thanks so much.

  2. #2
    In the Trades SacCity's Avatar
    Join Date
    Mar 2011
    Location
    Sacramento, CA
    Posts
    189

    Default

    On the previous post I mentioned that I frequently use food coloring die to test flapper valves
    Dump some food coloring into the tank and watch the bowl, if it slowly starts to change coloring then there is a leak at the flapper valve.
    Michael
    Sac City Plumbing

  3. #3
    DIY Junior Member rafael's Avatar
    Join Date
    Apr 2010
    Location
    SF
    Posts
    18

    Default

    Thanks for the response, SacCity. The sound I hear coming from the toilet is very similiar (although a little more muted) to what I hear when I gently push the handle down, so I'm pretty sure the problem is with the seal at the flapper valve. My concern is that the flapper seems fine, so I'm not at all sure buying a new one and installing it will help.

    I just got done reading the thread at:

    http://www.terrylove.com/forums/show...-flapper-leaks

    That makes me even less sure.

    It wold appear my model is slightly different than the one in that thread, because I don't see the rectangular thing in the picture. Instead, my model has a much smaller circular tube. I'm not sure what my model is.

    On the inside of the tank I see K4620. Is that the model number? If so, does anyone have any experience with the kind of problem I'm describing?

  4. #4
    DIY Junior Member rafael's Avatar
    Join Date
    Apr 2010
    Location
    SF
    Posts
    18

    Default

    A quick addition: I just did the food-coloring test, and yes, the dye is showing up in the toilet bowl.

  5. #5
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,651

    Default

    EVERYONE has had that experience, but we usually take care of it before it continues for a "few weeks". Flappers that "look good" can leak just like those the look bad, they just don't leak as fast. That picture you looked at is a "specific model" not the same as most flappers, which you probably have.

  6. #6
    DIY Junior Member rafael's Avatar
    Join Date
    Apr 2010
    Location
    SF
    Posts
    18

    Default

    OK, good to know. I don't see the model number stamped on the flapper itself. Do I just go to my hardware store and ask for Coastal Foundary flapper?

    Also, it's not clear to me exactly what gets removed and how. Does the styrofoam thing above the flapper come off and get replaced, too? Does anyone know of a YouTube video or other tutorial that shows how it's done?

  7. #7
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,405

    Default

    The styrofoam float is there to help in the timing of how long the flapper valve stays open. I'm pretty sure it comes with a new flapper, which also has the chain on it.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  8. #8
    DIY Junior Member rafael's Avatar
    Join Date
    Apr 2010
    Location
    SF
    Posts
    18

    Default

    OK, great.

    Thanks to everyone who took the time to respond. It's a real help to this plumbing newbie.

    If anyone has any thoughts on exactly what kind of flapper I should get, or any tutorials on how to remove it, that would be awesome.

Similar Threads

  1. Kohler 1-pc Rialto flapper leaks
    By Muggins in forum Toilet Forum discussions
    Replies: 24
    Last Post: 05-29-2013, 08:48 PM
  2. Kohler San Rafael Flapper
    By Newbe in forum Toilet Forum discussions
    Replies: 2
    Last Post: 10-17-2008, 04:44 PM
  3. Kohler San Raphael flapper driving me CRAZY
    By PabNYC in forum Toilet Forum discussions
    Replies: 6
    Last Post: 01-27-2008, 11:02 AM
  4. Kohler 3397 flapper
    By swimfan in forum Toilet Forum discussions
    Replies: 4
    Last Post: 05-28-2007, 06:40 AM
  5. Kohler Flapper replacement
    By atfdmike in forum Toilet Forum discussions
    Replies: 2
    Last Post: 03-26-2007, 09:19 AM

Tags for this Thread

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
  •