TOTO CST744E, 1.28GPF or 1.6GPF? To replace a Mansfield

Discussion in 'Toilet Forum discussions' started by Flamanar, Jun 1, 2014.

  1. Flamanar

    Flamanar New Member

    Messages:
    7
    Location:
    nj
    Hi. New here. Very interested in Toto toilets (never heard of them until tonight). Looking at the CST744E. I read a discussion further down here that I need clarification on. With this model, is it possible to change it from 1.28GPF to 1.6GPF by changing the flapper, or some other minor modification? I'm nervous that 1.28 might not be enough. Thanks!
  2. Terry

    Terry Administrator Staff Member

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    14,799
    Location:
    Bothell, Washington
    1.28 GPF is enough. They're now making 1.0 gallon toilets too. If you need more water, just hold the handle down a bit.
    The Dual flush TOTO Aquia I had in the main bath for a while, would flush with 9/10 of a gallon. (Less than a gallon)
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,824
    Location:
    New England
    Yes, you can just change the flapper valve and cause the toilet to use more water. It will probably end up using more than just the difference between the 1.28 and 1.6g, though, as the ratio of the tank/bowl filling is calibrated to the 1.28g flush...so, if you dump more water, it will run longer to refill the tank, which means it will run longer to fill the bowl, and the bowl won't hold more, so it goes down the drain being wasted.
  4. Flamanar

    Flamanar New Member

    Messages:
    7
    Location:
    nj
    thanks for the info! I'm just nervous going from a 22+ year old Mansfield piece of junk toilet to one that barely uses any water. I'll be getting the Toto 1.28. Thanks again
  5. Terry

    Terry Administrator Staff Member

    Messages:
    14,799
    Location:
    Bothell, Washington
    If your's was the 1992 1.6 gallon Mansfield, then yes, that was junk. We pull those out all the time. You may have a 3.5 from the time period, but those weren't so good either. There was a short period of time when they went from five to 3.5, and didn't really have that right either.
  6. Flamanar

    Flamanar New Member

    Messages:
    7
    Location:
    nj
    Looks like 1992 stamp on inside of tank. Looks like more than 1.6 gallon, but not positive. I have some pics of the interior of the tank I'll try to post, showing stamp marks. Might be able to identify it by those. It has a pink 'squishy foam rubber' tank-to-bowl gasket.

    DSCF2781.jpg DSCF2780.jpg DSCF2773.jpg
  7. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,824
    Location:
    New England
    Many of the original low-flow toilet were junk...they did not make functional changes to all of the parts, and just tried to use the old designs to produce an acceptable flush with a lower volume of water. IT just didn't work. Some have taken a much longer time to realize what it takes to work with a lower flush volume. If you look at the trap design of many of them, they have right-angle turns, which is not good for maintaining flow - things work much better when the curves are smooth and gradual.
  8. Flamanar

    Flamanar New Member

    Messages:
    7
    Location:
    nj
    Ok. I do have Crohns Disease, so a clean bowl wash may be important...but so is money. For something that does a reasonably good job on rinsing the bowl, would this model be ok? Or should I look for something else that would do a better job?? I doubt my wife would let me spend more than $300 for a toilet.
  9. wjcandee

    wjcandee Wise One

    Messages:
    1,771
    Location:
    New York, NY
    I would go with the CST744E. If it really doesn't give you enough bowl rinse, you can always just hold the handle down a little longer on any particularly-messy visits. We have two Original Drakes, and love them. The water does rinse all areas of the bowls, but because it's significantly-lower-flow, holding down the handle will give you a litle more rinse, which you may need for anything particularly-sticky. And it's a good value.

    You can swap the flapper for a Korky 3" Large Adjustable flapper, which allows you to change the amount of water that empties from the tank. But the extra water is rarely-needed at our house, so Terry's suggestion of the handle on those occasions is the most efficient approach.
  10. Flamanar

    Flamanar New Member

    Messages:
    7
    Location:
    nj
    Sounds like a plan. I'll settle on this Drake, then. Many thanks to everyone for all of your help/advice!
  11. wjcandee

    wjcandee Wise One

    Messages:
    1,771
    Location:
    New York, NY
    Let us know what you think after you get it in! And feel free to come back for installation tips if you're doing it yourself!
  12. Flamanar

    Flamanar New Member

    Messages:
    7
    Location:
    nj
    Thanks wjcandee! It actually arrived today (holy crap was that fast!). Packaging was exceptional, as was the price.

    I did check both the tank and bowl for any defects right away. Both looked fine, no chips/cracks/etc.

    One thing I had a question on: isn't the trapway supposed to be 'glazed'? And by 'glazed', do they mean 'shiny/reflective' like the exterior gloss of the toilet? Because looking into the bottom of the toilet and reaching my hand a ways in...it's not shiny smooth at all. But it's also not as rough as the underside of the toilet, either. Not sure what to think. Bowl is from Thailand. Tank is from USA. What do you think?
  13. Terry

    Terry Administrator Staff Member

    Messages:
    14,799
    Location:
    Bothell, Washington
    I think you're thinking too much. We have sold thousands of these.
    Your next step is to install it.
  14. Flamanar

    Flamanar New Member

    Messages:
    7
    Location:
    nj
    lol you're right. I do overthink things most of the time, though :) Install is delayed until I get the insurance funds (they may want another pic of the existing old/leaky toilet...long story). Thanks again
  15. Wallijonn

    Wallijonn Member

    Messages:
    126
    Location:
    Arizona
    +1 for an update.
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