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Thread: Toto Supreme E Max Leaking?

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    DIY Junior Member dmwesq's Avatar
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    Default Toto Supreme E Max Leaking?

    I have a Toto Supreme E Max that was installed about 8 months ago. It is just starting to make loud whining noise intermittently, and when I take the top off the tank there appears to be a slow drip from under the top of the fill valve. The instruction manual from Toto is virtually useless. Any ideas?

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    Retired Defense Industry Engineer jadnashua's Avatar
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    Toto generally uses two different fill valves. One is easily repaired, one usually needs to be replaced when it fails. I think you should still fall within the warranty period, so I'd call Toto. If the valve you have has a plastic screw on the top, other than cleaning the filter, if it fails, it must be replaced. If it doesn't have that screw, there's a seal that probably will fix it - it takes less than a minute to replace once you've done it the first time.

    While you're dealing with this, you may want to check your incoming water pressure. None of the toilet valves like pressure out of range, and in the USA, the max it should ever be is 80psi. If yours is over that, code requires it to be regulated to 80 or less. Excessive pressure can cause that, too. Most common though is either dirt on the seal, or a bad seal. At 8-months, though, it's probably dirt, and removing the seal and cleaning it off will probably fix it, if it is the repairable version. Check the wwhttp://www.korky.com/installinstructions.html site for instructions. Scroll down to the Quiet-fill replacement cap.
    Jim DeBruycker
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    DIY Senior Member wjcandee's Avatar
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    There is always a drip from the top of a anti-siphon valve like the Korky when it's refilling. Read the toto piece on servicing the fill valve that is often cited on here, and if that doesn't help, come back and we'll walk you through servicing it.

    Toto Servicing Instructions

    When does it whine? I.e. during filling, after shutoff, after the toilet has been sitting a while? Each suggests a different issue.
    Last edited by wjcandee; 12-13-2012 at 09:42 PM.

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    Retired Defense Industry Engineer jadnashua's Avatar
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    Make sure that the supply valve is fully open as well.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    DIY Junior Member dmwesq's Avatar
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    The valve is fully open. It makes this noise when the toilet has been sitting - did it all night last night - at some points it was about every 1/2 hour, then it slowed down and was less frequent, but the toilet was not in use at all overnight.

    I have the valve with the adjustment screw, so I guess calling Toto at this point would be the way to go if it is under warranty?

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    DIY Junior Member dmwesq's Avatar
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    Any idea how to contact Toto? The numbers listed on their website are not in service - never a good sign. Also, how do I check the incoming water pressure?
    Last edited by dmwesq; 12-14-2012 at 08:47 AM.

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    Forum Admin, Expert Plumber Terry's Avatar
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    Remove the supply line,
    Then remove the filter with needle nose pliers.
    If the filter is clogged, it will prevent a proper shutoff.

    A good replacement fill valve can be bought at Lowes, the Korky MaxPerformance.
    However, cleaning the screen filter on the one you have is what I would try first.

    Last edited by Terry; 12-14-2012 at 08:52 AM.

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    DIY Junior Member dmwesq's Avatar
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    Thanks - will give this a try later tonight.

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    DIY Senior Member wjcandee's Avatar
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    Quote Originally Posted by dmwesq View Post
    Thanks - will give this a try later tonight.
    Also, if it's making a noise every half hour while sitting, it may be that it isn't the fill valve at all. The valve may be making noise because it is refilling the toilet because water is leaking out of it slowly. This would be caused by a deteriorating flapper (or possibly by a siphon resulting from the refill hose not being "daylighted" above the lip of the overflow riser). One way to check whether the toilet is losing water is to turn off the water supply, mark the level that the tank water is at with a pencil, and check back several hours later. If the water level has dropped, most likely you need to get a new flapper. Get the Korky 3" universal replacement flapper at Lowe's, and you'll be all set.

    If you do need to replace the valve, the right one to use is the Korky MaxPerformance, also known as the 528MPK at Lowe's (and the 528MP everywhere else). Replacement takes at most 5 minutes, and no big tools required.

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    DIY Senior Member wjcandee's Avatar
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    Quote Originally Posted by dmwesq View Post
    Any idea how to contact Toto? The numbers listed on their website are not in service
    Huh. 1-888-295-8134 is their customer service number. Works fine for me.

    Are you sure you are dialing the prefix "888", which is correct, rather than "800", which is not?

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    DIY Junior Member dmwesq's Avatar
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    Will check all these methods as soon as I can. Perhaps their phones were down for a while - I dialed both their regular and 888 number correctly several times with not in service message - ended up getting through to one of their regional centers who gave me a direct email address - which so far has not responded either.

    Seems odd to me that the flapper would "deteriorate" after less than 8 months, especially since I have been in this house about 13 years and have not experienced similar issues - but I suppose anything is possible.

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    Forum Admin, Expert Plumber Terry's Avatar
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    Seems odd to me that the flapper would "deteriorate" after less than 8 months
    I've seen that on all the brands.
    That's one reason I like to see parts on the common hardware shelves.
    Chlorine is always a big no no, but sometimes I wonder if they are putting more in the water supply too.

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    In the Trades Gary Swart's Avatar
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    To check water pressure, you need a pressure gauge available at any hardware store for around $10-$15.

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    DIY Junior Member dmwesq's Avatar
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    Finally got around to addressing this problem. The tank was definitely leaking - the water was way down today inside the tank. I took out the screen - it looks pretty clean to me. I also don't see much of a problem with the flapper, but obviously it isn't keeping water in the tank. I also have noted on the photo where the leak appears to be on the flush valve. Have not tested the water pressure yet - want to try to solve these other issues first. Since Toto did not respond at all, I will probably try them as well as contacting the plumbing supply where I got the toilet from on Monday.

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    DIY Senior Member wjcandee's Avatar
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    Just finding the water being down, indicating a slow leak from the tank, is probably your only real problem. It could be more than just the flapper, but it's 95% likely that it's the flapper. So...if you're in Manhattan just go to Rainbow on 1st Ave on the west side between 75th and 76th (it's a fun hardware/everything store), which has an excellent selection of Korky flappers. They should have the Korky 3060BP large 3" adjustable flapper, which is a quick and easy replacement (or you can get it from that big online store that also sells the Kindle). The 2021BP "Fits Toto" GMax flapper will also work, but the latter will stay open a little longer than optimal, eliminating some of the water savings, making it more like a 1.8gpf toilet (more water in flush, longer refill and some refill water wasted down the drain). Korky doesn't list the setting for the Drake II in its current instructions on the adjustable 3" flapper, but you can call them (they're really nice) and they'll tell you, or you can use the method of marking the water level when the old flapper closes and adjusting the white band so that it mimics that. Or you can wing it because at the end of the day it doesn't make *that* much difference. (There are other places in Manhattan than Rainbow to find Korky products, but that one is in my neighborhood and has a zillion Korky products. If you are outside of the City, I would just get the 3060PK at the nearest Lowe's. Lowe's uses variations on the Korky model number on its web site, so it's 3060PK at Lowe's and 3060BP everywhere else.)

    Or call Toto and tell them to send you a new flapper because it quit way too soon. That will take about a week to arrive.

    As to the water dripping from the fill valve, I wouldn't sweat it. On many anti-siphon fill valves, there is always a little water running from the valve head. It goes into the tank anyway, so it's not an issue. If you look at the instructions for the Korky replacement valve, they make an explicit point that water is expected to flow from multiple places on the valve, including about the same place that you're pointing to on the Voreto. (Korky is the original valve on a lot of Toto toilets, but not yours; you have the Voreto fill valve, which is interchangeable with the Korky 528MP or the Toto TSU99A.X Universal Replacement Fill Valve, which is made by Korky in Wisconsin.)

    I'm guessing that the chattering that you are hearing is the fill valve opening a little to replace water that has escaped the tank by dripping past the flapper, and then shutting off. When you eliminate the leak from the flush valve and flapper, you won't need to worry about the fill valve.

    Finally, I would rinse off that screen; it appears to have a little schmutz on the top part of the photo, if I'm viewing correctly.

    Let us know how it turns out.
    Last edited by wjcandee; 12-21-2012 at 08:34 PM.

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