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Thread: toto drake eco TSU33A fill valve cycling on and off quickly

  1. #16
    DIY Senior Member wjcandee's Avatar
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    Actually, I think it's the same cap except one is beat to $&!^. In your photo, you can see the tool marks in the new one which have resolved in exactly the places as the old one, just not as deep.

    Answer -- it was the cap. And now you have a complete valve if you ever want to replace any other parts except the float. For that price, I'm guessing they sold you the white-cap 528, but all you needed was the cap. If you got a 528MP, then you got a really good price.

    I'm so happy we were able to get you back in business with a relatively-minimal hassle. Now that you're up and working, you can still consider reporting the failure to Toto and seeing if they'll send you a new valve; that way you can put it in the drawer until next time. Taking the whole valve out actually is pretty easy, you usually can unscrew the mounting nut on the old one by hand or with one application of pliers, and then you have everything new when you put in the new one. Toto customer service is at 1-888-295-8134. Note it's an 888 number not 800.

    Congratulations!

  2. #17

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    Quote Originally Posted by Maxxsounds View Post
    Went down to my local plumbing supply house today. They had the whole valve on sale for $7.99 so I bought it. They did not have just the cap. Anyway, after swapping out a few different pieces, I got a functioning valve. The caps were quite different from each other as you will see in the photos. (I don't know what the original cap was supposed to look like new) I had to use the old float. The new float did not fit in the old housing correctly for some reason. thanks for your help guys.Attachment 18548 Attachment 18547
    Wow that cap that was in there looks horrible for 2 years! The Korky in one of our Drake's is going on 7 years old with the original cap and still looks more like the new one you showed a photo of! Your water pressure must be very high, or perhaps it's something in that dirty water that didn't like the rubber much!

  3. #18
    Retired Defense Industry Engineer jadnashua's Avatar
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    Wouldn't hurt to check your water pressure, and if you have a closed system, verify that the expansion tank has not failed. There are lots of threads discussing closed/open water supply systems and the use of an expansion tank. WHere I live, one is required, period, even in an open system. Now, it doesn't do much there, but if the water company ever upgrades the meter or supply, it could easily become a closed system and you're already prepped for it. The Korky valve shuts the water off fairly slowly, but if there's another device around nearby that is fast acting, water hammer could pound that seal pretty hard. Maybe a hammer arrester would help.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #19
    DIY Junior Member Maxxsounds's Avatar
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    Quote Originally Posted by jadnashua View Post
    Wouldn't hurt to check your water pressure, and if you have a closed system, verify that the expansion tank has not failed. There are lots of threads discussing closed/open water supply systems and the use of an expansion tank. WHere I live, one is required, period, even in an open system. Now, it doesn't do much there, but if the water company ever upgrades the meter or supply, it could easily become a closed system and you're already prepped for it. The Korky valve shuts the water off fairly slowly, but if there's another device around nearby that is fast acting, water hammer could pound that seal pretty hard. Maybe a hammer arrester would help.

    Thanks, I'll look into it. I really appreciate all you guys that helped me. This site rocks.

  5. #20
    DIY Senior Member wjcandee's Avatar
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    Thank YOU for starting what has turned out to be a fun and informative thread. Jim and Gary have posted quite a bit of good advice on water pressure around this forum, including how to use a $10-or-less meter to check it and what to look for with respect to expansion tanks. The diaphram in that cap was really squashed, so it occurred to me that maybe it was a water pressure issue, but that's not my expertise so it was good to see others weigh in on it.

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