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Question DetailsAsked on 9/9/2013

Why is my toilet bowl emptying on its own?

My toilet is almost new and the water in the bowl drains out in between use until there is no water left.

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2 Answers


I am assuming here this is not immediately at the end of flushing - that it just drains almost all the water outand does not refill to normal bowl level - which would be a refill tube seting or tube problem. I will proceed on the assumption that the bowl fills up fine after flushing, filling the exit tube fully and with the final water level resting a bit above the start of the exit channel, fully filling the part of the exit tube you can see, then gradually drains down from there.

Toilet looks something like this, although the trap is the entire part from the bottom of the bowl to the high part at the upper right of the toilet picture - actually higher than where it is labelled -

Two possibilities - either something like a piece of toilewt paper or fabric is draped over the top of the trap (the farthest, highest point in the curved outlet from the bowl), wicking the water over the high point the same way a lantern wick xxxx oil or gas up tothe top of the wick to burn. It would wick only as far down into the bottom of the bowl as the bottom of the material doing the wicking, so if the water level drops down low enough you can see the back edge of the lowest portion of the bowl aqnd nothing is there at or into the remaining water, that is not the problem. You can swish a small diameter toilet brush around in there to make sure nothing is caught in the front of that area, but it would take a flexible toilet trap brush to get all the way up to the high point. Usually, after a few flushes anything like that would wash out.

Oher possibility is a crack or pinhole in the lower part of the trap or in the form seam of the toilet, which runs down its centerline - allowing water to leak out the bottom. This would be bad, because it would be leaking under your floor and into the subfloor area, eventually saturating your subfloor in the area and coming out downstairs, if this is not on the ground floor.

Hard to say for certain, but wicking would take many minutes - I would guess 30+ to drain the trap, and it would NOT go totally dry unless the wick went all the way to the bottom of the outlet channel, which you would be able to see - would still be a bit of water left in the bottom of the bowl outlet. A crack or pinhole, of course, could drain it in anything from maybe a minute or so on up, and if at the low point could totally drain the bowl.

Since almost new, I would suspect a manufacturing defect somewhere in the trap area - consider if it has done this since new - if so, most likely a manufacturing defect.

I would have a plumber take it off (unless you know how) and inspect it, and check for water leakage underneath it. Obviously, if bought from and installed by a plumber, use the same one for warranty purposes.

Answered 6 years ago by LCD


My toilet bowl empties on it's own. with no water in the tank it will not flush. Where is the water going. Everything just sits there empty and bowl does not refill with water.

Answered 3 years ago by Guest_98590931

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