We have a Kohler Hatbox toilet that was installed last summer. This week it has been making flushing noises at random then will not flush until we have disconnectedeconnected power. this is a tankless toilet. also at what level should the water be in between flushes? Until yesterday it had minimal water in the toilet bowl but the refill level has been higher since the plumber came out. Has it not been working properly since it was installed or should it still be at that low level? we thought we had the problem fixed yesterday as it worked the rest of the day without any problems but voila. 5:00am the random flushing began again. Hoping that someone has an answer. thanks!

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Posted on Jan 02, 2017

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Kohler is correct. The most likely cause of this problem is an obstruction in the common vent stack that both toilets share. When you flush the old toilet it need more air to flush and will get it from the easiest source (your new water saver toilet). First adjust the float level in the old toilet so it won't use as much water or just stick a brick in the tank to take up space.Second, run a snake down the vent stack from the roof to check for obstructions. Birds will sometimes nest in there.

Posted on Mar 16, 2009

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Does it leak from the overflow? If so then the washer at the top of the Fluidmaster needs to be replaced. If it is not going over the overflow then you will need to replace the flapper on the flush valve.

Posted on Apr 11, 2009

Michael Thorpe

• 2702 Answers

SOURCE: Can't adjust flush time for complete flush, low bowl water level

flush time depends on how much water is in it,
the water level flote has an adjuster on it, but i cant rember were it is,,, sorry

Posted on Oct 24, 2009

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Check tank for fill line running from fill valve to overflow tube. It will be a 1/4 " line that allows the tank and bowl to fill. It should be connected from fill valve and connected at the top of overflow by a clip or hanger.

Check out the water level in tank to make sure it is filling to line on overflow or within 5/8" to top of overflow pipe.

Posted on May 29, 2010

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Try replacing the flapper, they are cheap and so long as the tank and or bowl are not cracked you can replace all of the internal parts and basically have a brand new toilet much cheaper then replacing the entire unit. Go down to your local hardware store and everything you need is in one simple kit with very simple instructions. Good Luck.

Posted on Jul 22, 2010