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Loreen
Toilet Losing Bowl Water

Hello,

The toilet in my upstairs bathroom is losing water in the bowl. Several minutes after a flush, I can hear it gurgle/drip. When it is done making its noise, the bowl is totally out of water.

What could be the cause?

Thanks,
Loreen

dj1
Re: Toilet Losing Bowl Water

Now to the toilet...

Tank-to bowl leak could mean: bad flapper, bad flush valve or bad flush valve gasket.

Start with the flapper - replace it with a new one that fits your tank. If the leak persists and your toilet is a two piece toilet, replace the flush valve and the gasket (to do this you must remove the tank)

A. Spruce
Re: Toilet Losing Bowl Water
dj1 wrote:

Now to the toilet...

Tank-to bowl leak could mean: bad flapper, bad flush valve or bad flush valve gasket.

Start with the flapper - replace it with a new one that fits your tank. If the leak persists and your toilet is a two piece toilet, replace the flush valve and the gasket (to do this you must remove the tank)

What I think you meant was to start with checking out the main vent for a plug. As other drains are used, it creates a vacuum in the system and will draw the water out of all the traps, including the toilet.

Once that is done, NOW you can move on to the toilet itself. :cool:

Mastercarpentry
Re: Toilet Losing Bowl Water

Agreed on checking the venting, but I've also seen this when the drain was over-pitched past the toilet; the excessive flow rate creating too much vacuum for the properly-sized vent to handle. Unlikely here so it's probably a clogged vent.

Phil

JLMCDANIEL
Re: Toilet Losing Bowl Water

I agree, the vent is most likely blocked or missing. The flush going down the drain causes a vacuum that sucks the water out of the bowl.

Jack

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