Toto Ultramax Korky fill valve replacement

Discussion in 'Toilet Forum discussions' started by Jason Jones, Feb 17, 2019.

  1. Jason Jones

    Jason Jones New Member

    Joined:
    Feb 17, 2019
    Location:
    NC
    I replaced the full valve in my Toto Ultramax yesterday with the Toto branded Korky fill valve for my toilet. Install went fine and it seems to work fine. I set the height and bowl fill based on the instructions.

    However, every time it fills up at the very beginning of the water flow for about 3 seconds it sounds like there is air in the water line and there are numerous bubbles in the tank around the fill valve tube to the bottom of the tank. After the 3 seconds the fill finishes quietly and stops as it should.

    I have flushed it numerous times thinking there was just air in the line, but it keeps happening.

    Is this normal for the Korky or is something defective with it? The previous Toto fill valve (green) did not do this. The water line is open all the way and I have tried closing it some but get the same result.

    Thanks.
     
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    Is the hose going to the overflow attached to its clip holding it above the tube, or is it pushed down into the tube? It must be above the overflow tube to work properly. If it's below, it's possible it can siphon a bit, which may introduce some air.
     
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  4. Jason Jones

    Jason Jones New Member

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    Feb 17, 2019
    Location:
    NC
    I just double checked and the hose is on the metal clip and sitting right above the tube. The hose is on the long side though so maybe I should trim it further.
     
  5. Jason Jones

    Jason Jones New Member

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    Feb 17, 2019
    Location:
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    Photo of setup.
     

    Attached Files:

  6. wjcandee

    wjcandee Wise One

    Joined:
    Apr 27, 2012
    Location:
    New York, NY
    I have the same issue with our new Clayton and the Toto-branded Korky. This valve doesn't sound like our other 528s and makes exactly the sound you are describing. I cleaned the valve and it made no difference. I'm eventually gonna swap it for a 528MP and see if it makes a difference. I will let you know. It's either the hose to the wall or the fill valve. If you used the same hose, then it's probably the valve.
     
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  7. Jason Jones

    Jason Jones New Member

    Joined:
    Feb 17, 2019
    Location:
    NC
    Did you ever figure out your issue with this? Mine is still doing it.
     
  8. wjcandee

    wjcandee Wise One

    Joined:
    Apr 27, 2012
    Location:
    New York, NY
    I'm staring at a Korky 528 Pro to replace it with. Just haven't done it yet. I will get my butt in gear and do it in the next couple of days, and definitely will let you know if it fixes it.
     
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