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 Toto toilet runs
Author: Hokie76 (FL)

We had a Toto-brand toilet installed several years ago. The G-Max flushing system works great; however, it's started sounding like it's running sometime. The sound stops when the water's turned off, and doesn't always resume when turned back on. We tried dye tablets, but nothing appears in the bowl to indicate a leak. Our water bills have nearly doubled over the past few months, so there's a leak somewhere. It looks OK, but should we start by replacing the inexpensive flapper first? Thanks.

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 Re: Toto toilet runs
Author: T Vinyard (CA)

Look in the tank whats'happening?

Water leaking out of a tank, can be caused bywater getting past the flapper. no noise untill water is replenished by a properly working fill valve. If water inlet was off the tank would empty itself

Water running over the overflow tube and not shutting off when tank is full is a bad fill valve. Running fill valves make noise. when inlet water is off the tank will remain full no noise.

fill valve and flapper can be bad simulanteously as well. sound like you have a bad fillvalve ( I can't see your post while writeing this I think that's what I remember

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 Re: Toto toilet runs
Author: LemonPlumber (FL)

I would advise you to lower the level of water in the bowl about 1/2" if is near or at the top of the overflow tube and to be sure the primer tube is above the water level of the tank.If dye or food coloring does not get from the tnk to the bowl in five minutes ,I would say the flapper is ok.Good Luck.

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 Re: Toto toilet runs
Author: Hokie76 (FL)

I checked the tank after it had filled up. The constant "hissing" noise appears to be coming from the fill valve, although no water was moving inside the tank. When I turn off the water supply, the noise stops. It resumes when I turn the water back on, but not always. The flapper is shedding tiny pieces of rubber, and should probably be replaced anyway. I'll start with that and see what happens. Thanks.

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 Re: Toto toilet runs
Author: LemonPlumber (FL)

Yea.if it is coming a part it needs to be changed.Is the fill valve mechanical arm type?Where you could empty the bowl hold the arm up and see if water is coming through the side or joints of the valve.Any way Good Luck.If you fell lucky you could dissamble the fill valve and look for debris in the valve seal.



Edited 1 times.

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 Re: Toto toilet runs
Author: redwood (CT)

Which of these fill valves do you have?



or,

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 Re: Toto toilet runs
Author: Hokie76 (FL)

It's the one on the bottom. At 200 gallons a day, we're going to try to avoid using it and will turn off the water supply after every use until the problem is fixed. Thanks.

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 Re: Toto toilet runs
Author: e-plumber (NY)

Install a new fill valve and flapper, using OEM replacement parts or Korky brand, (pictured below).


and one of these



*A Fluidmaster 400-A fill valve won't work in a G-Max toilet.

e-plumber
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"The society which scorns excellence in Plumbing as a humble activity and tolerates shoddiness in philosophy because it is an
exalted activity will have neither good Plumbing nor good philosophy: neither its pipes nor its theories will hold water." -
John William Gardner 10/8/1912 - 2/16/2002

Repair your leaking Plumbing fixtures ASAP [www.theplumber.com]
This slow drip will waste 7+ gallons of water per day.

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 Re: Toto toilet runs
Author: LemonPlumber (FL)

E,Why would you say that?* a Fluild master 400 would not fit.I used a couple to repair these and seemed fine.The shafts on the toto fill valves where broken by a maintenance man who thought they needed adjustment.They needed flappers,But he could not find the right ones.

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 Re: Toto toilet runs
Author: e-plumber (NY)

I had a problem once w/ a 400-A that was installed in Drake G-Max toilet which was not flushing right and inquired about it. I was told that the Toto fill valve (or Korky equivalent) has a higher refill flow rate than the 400-A fill valve which can account for not enough water replenishing the trap seal (before the fill valve shuts off), for a complete flush and also will cause a smaller water surface area in the bowl.

e-plumber
-----------------------------------------------------------------------------------------------------------------------------------

"The society which scorns excellence in Plumbing as a humble activity and tolerates shoddiness in philosophy because it is an
exalted activity will have neither good Plumbing nor good philosophy: neither its pipes nor its theories will hold water." -
John William Gardner 10/8/1912 - 2/16/2002

Repair your leaking Plumbing fixtures ASAP [www.theplumber.com]
This slow drip will waste 7+ gallons of water per day.

Post Reply

 Re: Toto toilet runs
Author: LemonPlumber (FL)

Ok.I have always used the steal clip free from the rest of the refill tube connector when I install 400 a.May be why mine worked.Or just different flow rate to the valves.Good Luck.The new pro45b's fill way slow,but some times they work so quietly I have to listen to here them.

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 Re: Toto toilet runs
Author: redwood (CT)

Look at this link. [www.korky.com]
There is also an instructions link there.
It takes about a minute to fix and the valve does not need replacement.

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 Re: Toto toilet runs
Author: hannar (Non-US)

Hi there. i've been having hissing problems with my newly installed toilet with a G-max valve. The hissing seems to come from the valve. Nothing is leaking in the toilet. The noise starts when the toilet hasn't been flushed for a while and then the valve makes this loud noise and stops.
I was told that it may be caused by the top of the valve (sorry, i don't know the terminology of toilet stuff...) where the rubber seal might be defective.
Here's my question, how do I disassemble the G-max valve? will that even help solve the problem.

Thanks and I appreciate your comments

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 Re: Toto toilet runs
Author: Silverryan (CA)

My toto toilet with a type A gmax fill valve makes an awful noise when filling. Can anyone help me repair this issue?

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 Re: Toto toilet runs
Author: Bill R (CA)

Question: I have a Toto Pacifica two piece toilet with G-Max. My valve looks like the top picture but the number stamped on top is "16" and there is a date stamped on the side: "0603/06"
After the tank has filled, no water is running and the flapper is not leaking. However, there is a continuous rapid clicking sound. I can only stop the clicking when I turn off the supply line to the toilet.
Can I fix this clicking sound on my own by opening up the valve (how?) or do I need to replace the valve, or ??? The clicking annoys my wife.

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