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 toilet flush creates another toilet to lose water in bowl
Author: gradford (NY)

Installed a new Kohler Complete solution toilet yesterday. Works fine but when I flush it the toilet in an adjacent room bubbles slightly and the water level in the bowl depletes by about half ? Any help or solution please.. Thanks

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 Re: toilet flush creates another toilet to lose water in bowl
Author: hj

That indicates a drain line problem of some kind, but since it could have more than one possibility, we could not diagnose it from here, and would have to be there to see it actually happen. Some causes are easy to cure, some a bit more difficult, and the worse ones impossible without revising some piping. But the make and model of the toilet should not be relevent to the problem, or its symptoms.

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 Re: toilet flush creates another toilet to lose water in bowl
Author: waukeshaplumbing (WI)

drain is plugged somewhere...the negative pressure that should be coming from your vent is sucking water from your next toilet

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 Re: toilet flush creates another toilet to lose water in bowl
Author: packy

this never happened before you installed the new toilet?

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 Re: toilet flush creates another toilet to lose water in bowl
Author: gradford (NY)

No ..never happened before. The new toilet has a harder flush which is what i wanted . Do you think the venting may be the problem?

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 Re: toilet flush creates another toilet to lose water in bowl
Author: gradford (NY)

All my drains work fine. Do you think it may be a venting problem or obstrution?

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 Re: toilet flush creates another toilet to lose water in bowl
Author: waukeshaplumbing (WI)

one way to test is to get a 5 gallon bucket and keep pouring it down the toilet.the clog isnt bad enough to back up 1.6 gallons, but may with 5 gallons..if it backs up anywhere else you have a plug...

it is a venting problem and odds are its plugged a bit near the vent

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 Re: toilet flush creates another toilet to lose water in bowl
Author: hj

Do we THINK venting is a problem? No. Could venting be a problem? Yes. Without being there to see the actual process and make our own tests, we cannot tell WHAT the reason is. There are ways the pipes could have been installed which could cause it to happen even with a clear vent.

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