Home>Discussions>PLUMBING>Toilet 'runs' for about 3 seconds after water run anywhere in the house
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WINT142000
Toilet 'runs' for about 3 seconds after water run anywhere in the house

Within the last few months I have had issues with our master toilet. When I run water elsewhere in the house, (pretty much anywhere: sink, toilet, shower, etc), when I turn the water back off the toilet upstairs runs for about 3 seconds.

I can't pinpoint exactly when the problem started, but around the same time it started I flushed out the hot water heater and I adjusted a venting leak around the drain pipe in the basement. Other than that, I am at a loss with this one.

dj1
Re: Toilet 'runs' for about 3 seconds after water run anywhere in the house

I don't see the connection between your faucets and the toilet.

A toilet tank works on very simple and basic principles. If you are experiencing some difficulties, or your tank is behaving badly, it may be a good time to check it out and give it a tune up.

Internal parts for a toilet tank are not very expensive. Start by replacing the flapper jack.

MSSP
Re: Toilet 'runs' for about 3 seconds after water run anywhere in the house

try setting the water level in your tank lower. there should be a mark that says water level. usually about an inch below flush tube. You might have high water pressure in your house.

WINT142000
Re: Toilet 'runs' for about 3 seconds after water run anywhere in the house

I couldn't really think of a connection either other than perhaps a pressure issue. I will look into the tank and see if there is an issue there. Thank you for the replies!

JLMCDANIEL
Re: Toilet 'runs' for about 3 seconds after water run anywhere in the house

Replace the fill unit in the toilet, is has weakened enough to allow back flow.

Jack

von_steuben
Re: Toilet 'runs' for about 3 seconds after water run anywhere in the house

I agree with Jack.

You have a defective toilet fill valve that is either mis-adjusted too low, or doesn't have an anti-siphon valve, or the anti-siphon valve is shot, causing any drop in house water pressure (when another tap is opened) to reduce water pressure at the toilet supply line & suck some water out of the toilet tank; the refill valve responds by refilling the toilet tank---this is dangerous because it can pollute your drinking supply under certain conditions---most new toilet fill valves sold by Fluidmaster & others have a built-in anti-siphon valve as a code requirement in most areas----you'll also run up a big water bill, so you have to fix this as soon as possible.

http://www.toiletology.com/anti-sph.shtml
http://millardlumber.com/HowTo/rtoliet/toilet.htm
http://www.ci.bloomington.mn.us/handouts/53/53ytoilet.pdf

guy48065
Re: Toilet 'runs' for about 3 seconds after water run anywhere in the house

I have a slightly different spin. Replace the flapper. Your flapper isn't making a good seal and is allowing a small amount of water to seep out. Eventually the fill valve lets make-up water in. When nearing the point where the valve would open to admit more water if you open a faucet elsewhere in the house the pressure change will "bump" the valve into opening right then.

I really don't see how the pipe pressure could ever get low enough for a fill valve to siphon water from the tank (not bowl as suggested above--there's an air gap between tank & bowl that would prevent this unsafe condition).

JLMCDANIEL
Re: Toilet 'runs' for about 3 seconds after water run anywhere in the house

Checking a flapper valve is easy, just dump some food coloring into the tank and see if the color leaks into the bowl.

Jack

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