Toto flapper and fill valve

Discussion in 'Toilet Forum discussions' started by dotil, Jul 30, 2009.

  1. dotil

    dotil New Member

    Jul 30, 2009
    I have a Toto 1.6 gpf two piece toilet, elongated bowl, but I do not know the model. Flushing requires the handle to be held down for about 6 seconds.:mad: Otherwise the flapper just closes and the toilet does not flush. From reading this forum I gather that is not the way it should operate.

    Since the fill valve and flapper look pretty dirty/corroded, I am just thinking about replacing both of them to upgrade the innards and restore proper flush operation, and hopefully not have to mess with it again for some time.

    The present fill valve is a 1B1 Master Mark III. What brand/model fill valve and flapper would you recommend for my Toto? I see many good comments about the Fluidmaster 400A. Will it work for the Toto?

    If you need to know the model of my toilet - how do I determine that?
  2. Terry

    Terry Administrator Staff Member

    Aug 17, 2004
    Bothell, Washington
    If you have the builder grade TOTO with 2" universal flapper, then it may be that whoever replaced the original flapper used a replacement and didn't cut the part off that goes on the overflow tube.

    When replacing the flapper, make sure it swings freely on the posts.
    You may have to trim off some of it with a scissors.

    Any generic fill valve should work, either the Fluidmaster or the Korky.

    Looking inside the Toto ST703 tank for the builder grade model.
    Last edited by a moderator: Jul 30, 2009
  3. Sponsor

    Sponsor Paid Advertisement

  4. dotil

    dotil New Member

    Jul 30, 2009
    Thanks Terry for your reply-

    Since my first post I have been looking at pictures of the Totos. So even though my toilet looks on the outside like a Drake, are you saying it may be a cheaper model with a smaller drain hole?

    When measuring to determine if I have a 2" drain hole, is the measurement taken as the inside diameter of the flapper seat hole? Because if I were to remove the seal and gasket, etc. the hole would be somewhat larger. I just do not know where the measurement is taken.
  5. Reader Review

    Reader Review Comments by readers

    Jan 2, 2006
    Emails and phone calls sent in by readers
    The Drake never came with your fill valve.

    The flush valve is measured with the inside diameter.
  6. dotil

    dotil New Member

    Jul 30, 2009

    Attached Files:

    Last edited by a moderator: Jul 31, 2009
Similar Threads: Toto flapper
Forum Title Date
Toilet Forum discussions OEM Toto CST854 Flapper Nov 6, 2015
Toilet Forum discussions Toto CST854; replaced flapper but water keeps running on after flushing Jul 16, 2015
Toilet Forum discussions Toto Universal Flapper THU499s Jun 16, 2015
Toilet Forum discussions Can't locate TOTO Original Flappers or at least the rubber seal gasket. Feb 10, 2015
Toilet Forum discussions Toto Drake Flappers failing and huge water bill Oct 23, 2014

Share This Page