Toto toilet flapper problem

[Montalvo]

I've put two new flappers into my Toto toilet (Carollton model) to deal with an intermittent leakage from the tank to the bowl and still the problem continues. A call to Toto's customer support suggested that there might be smutz on the rim of the tank's drain hole so I scrubbed it with a scouring pad but no improvement.

After flushing, the tank fills normally and then some time later, the tank is heard filling up a bit more in response to leakage from the tank into the bowl. This continues indefinitely. The flappers were pink flappers bought at a plumbing supply store for this model toilet and represented to me as Toto brand, although they were not in a labelled box or wrapper. The Toto rep verified that the pink flapper was the correct one for my Toto model.

Anyone have any suggestions?

Thanks,

Bob

[jadnashua]

Is the Carollton a two piece toilet (can't remember)? If it is, instead of leaking past the flapper, it could be leaking past the gasket sealing the tank to the bowl. If so, then you may need to pull the tank, tighten the nut holding the flush valve in place, then reinstall. If when you run your finger over the flapper seal, if it is smooth, then that's not likely the problem.

Also, make sure that the flush handle and chain are adjusted properly - there shouldn't be too much slack in the chain, and it should pull up nearly straight, and not pull to the side. If the flapper wasn't stored properly, it could get warped or distorted. When looking at it, does the sealing surface appear to be flat or is it warped?

[Montalvo]

Is the Carollton a two piece toilet (can't remember)? If it is, instead of leaking past the flapper, it could be leaking past the gasket sealing the tank to the bowl. If so, then you may need to pull the tank, tighten the nut holding the flush valve in place, then reinstall. If when you run your finger over the flapper seal, if it is smooth, then that's not likely the problem.

Also, make sure that the flush handle and chain are adjusted properly - there shouldn't be too much slack in the chain, and it should pull up nearly straight, and not pull to the side. If the flapper wasn't stored properly, it could get warped or distorted. When looking at it, does the sealing surface appear to be flat or is it warped?

Yes, Jim, it's a two-piece toilet but if it was the gasket, wouldn't it be CONSISTENTLY leaking? Also, pressing down on the flapper seems to remedy the problem...until the next flush.

But I will check on the chain. The flapper didn't seem warped/distorted. I installed a new fill valve about six months ago that was leaking out the bottom of the tank. I bought a cheapy at HD but that shouldn't have anything to do with it, would it?

[jadnashua]

A generic fill valve will probably waste water verses the factory one which is calibrated to the bowl/tank requirements. There are a few generic ones that are adjustable.

Some generic flapper valves have both a ring and loops to attach it to its pivot...if yours does, you cannot use both. Toto tends to use nubs, so on that type of flapper, you must cut out the ring. Using both tends to distort the flapper, causing it to leak.

[wjcandee]

Yes, Jim, it's a two-piece toilet but if it was the gasket, wouldn't it be CONSISTENTLY leaking? Also, pressing down on the flapper seems to remedy the problem...until the next flush.

But I will check on the chain. The flapper didn't seem warped/distorted. I installed a new fill valve about six months ago that was leaking out the bottom of the tank. I bought a cheapy at HD but that shouldn't have anything to do with it, would it?

The good news about the Totos, particularly the G-Max, seems to be that good generic parts that work in them are readily available. If you're pretty sure it's the flapper (and not the chain, which is a very good suggestion), just go to HD (or Ace) and get the Korky "Fits Toto" Red flapper (part 2021bp) -- there's a blue and a red and the Carrollton takes the red. It's a manufacturer-approved part in lieu of the Toto THU175S, which is the official part on your toilet's parts list. Your toilet model number is CST774S... so you can see on the Korky box for the Red Fits Toto flapper that it's for your toilet. I have actually had some fun changing out the guts of my toilets, so I would probably start by pulling the tank, pulling the gasket off the flush valve nut and seeing if it seems like water is leaking out through there, and checking the tightness; I notice that Jamie Love, in his piece on installing a Toto Drake, recommends that you use pliers to snug up that nut before installing. (I use 12" channel locks which are perfect for this.) If it isn't that simple, I might just change out the whole flush valve -- the official Toto thing (THU129w-2a, just search on that) for $19.20, including the valve and the flapper, and they usually ship my stuff the same day. It's certainly an easy project to do, and then you'd just be done with it.

As others have mentioned, although you can use any old fill valve in your Toto, you are likely not diverting the right amount of water to the refill tube (and thus either wasting water or not putting enough water in the bowl to start that perfect flush). Korky has the Fits Toto fill valve, it's the -T version of its 528 fill valve (so 528-T), available at lots of home supply places. That Korky valve is actually one of the ones that is mounted as original equipment in a big percentage of the Toto G-Max toilets (they use a couple of suppliers and LaVelle/Korky is one); I have it in one of my two Drakes. It is set differently from the regular 528 such that it diverts the right percentage down the refill tube. You really might find that the thing flushes better when the right amount of water is diverted. (Korky also makes a "MaxPerformance" version of the 528 (528MP) valve that lets you adjust the refill percentage, for the same money, but why have to bother adjusting when you can just get the one that always does the trick.

Hope these thoughts help.

[Montalvo]

Well, I decided to double-check my claim that the flapper seals when I hand-set it over the tank drain. I shut off the water supply and found that the tank DID drain, even when the flapper appeared to be firmly (hand-set) in place. That suggests that perhaps Jim's other thought, a leak in the tank/bowl gasket, may be the problem. But when I ran my test, the tank didn't TOTALLY empty...it just went down to exactly level with the top of the plastic bezel that the flapper seals against. And THAT suggests that it may still be the flapper...UNLESS the gasket under the bezel stopped leaking when the head pressure dropped as the tank water level reached just a half-inch (IMHO, unlikely that it would just happen to stop leaking precisely when the water level was at the top of the bezel).

Soooo...I'm gonna buy the "Korky "Fits Toto" Red flapper" recommended by wjcandee (thanks for all your info!) and see if that fixes things. I'll let you know how it turns out.

[wjcandee]

Soooo...I'm gonna buy the "Korky "Fits Toto" Red flapper" recommended by wjcandee (thanks for all your info!) and see if that fixes things. I'll let you know how it turns out.

Great! Do let us know. Also, I know you know how to install a flapper, but do read the Korky instructions, if for no reason other than they are always wonderfully-illustrated and well-written, a real pleasure in this world of poor instructions. Terry often comments on how professional plumbers sometimes botch things because they don't bother to read instructions; in one memorable post, he commented that the job botched by the plumber in question required two simple tools that the plumber didn't use, a TAPE MEASURE and READING GLASSES. So I now always heed Terry's advice to read the directions, even if I assume that I know what they are.

Here's a link to the Korky flapper instructions (Hey, Look! It's your Carrollton in the illustration! [and these are a lot less complex than their directions on how to overhaul everything in the tank, which are great, but so be it]): http://korky.com/PDF/2021BP.pdf

Good luck and let us know how it turns out.