Question about Kohler Toilet - One Piece with Ingenium Flushing System - San Raphael by

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Sbout 2 weeks ago the kohler toilet in the second floor bath started to not flush properly. I have cleared the small vent holes under the rim, I have checked the hole in the bottom for blockage, I have checked the main vent pipe for blockage and I have tried a closet auger. Nothing has changed; when flushed, the bowl fills with water like it is clogged and then slowly drains out. Five flushes are needed to clear urine.

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Poor draining toilet checklist


1. Is the toilet plugged or partially plugged. I have removqed toothbrushes, combs, toys etc. from toilet traps so check for any obstructions.
2. Rust and scale buildup. The buildup of rust , sediment and or scale in the internal passages of a toilet can greatly affect their performance.clean the small holes under the rim with a small piece of wire. Use Limeaway or CLR to remove rust and scale. put some in the tank and flush toilet. Let sit for a while and repeat.
3. Improper venting or plugged vent. A toilet needs a properly vented drain to work correctly. Check the vent to make sure it is not plugged or in the northern climates frosted shut.
4. Mechanical issues. Is the flapper lifting high enough when flush lever is flipped. Is water at correct height in tank. If it is a pressure assist is water pressure high enough. Is pressure tank waterlogged.
These are just afew of the many things that can cause a poor flushing toilet. Hope this helps.

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1 Answer

Flushing problems


Tank needs more water and the flapper has to stay open longer by adjusting chain so the flapper goes up higher when you flush the unit. Practice and you will get it right.

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1 Answer

My saniflo has started to go slow- it now does small pumps - one every 30 seconds so takes 5 minutes to drain the bowl. I'm pretty sure no foreign objects have gone into it as it's only me and my wife...


Typically when solids don't leave the toilet after one flush or if it short cycles like is doing, then is definitely a pressure problem. Is the unit vented via an 1 1/2" vent pipe to the open air? Please disconnect the vent pipe and leave the vent connection open to the room, flush the toilet and check if it makes a difference. Air must flow in and out of the vent pipe at all times so it can work properly. An obstruction on the vent pipe can cause this issue. Also could be calcium build up inside the rim of the bowl. Pour a few cups of vinegar on the toilet tank and then flush the toilet, it should get rid of calcium right away.

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1 Answer

Our Kohler K3402 suddenly stopped flushing. When you pull the handle and the flapper comes up, all that happens is the tank begins draining into the bowl and the bowl level rises, almost to the rim. The...


If there is a shower in the same bath is it also draining slowly?
If so check that drain systems air vent, (on the roof).
Find the pipe coming out of the roof nearest the bathroom with the problem and when a second person flushes the toilet you should be able to feel
air moving in and out of the pipe with your hand covering the end. If not the vent could be blocked by leaves or animals etc., this vent has to be clear in order for water to drain properly.

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1 Answer

The flush does not seem to be strong enough. Waste was stopped up. Is there anything I can do to improve volume elimination?


FIRST CHECK THE WATER LEVEL INSIDE THE TANK. MAKE SURE IT IS INLINE WITH THE MARK INSIDE THE TANK. SECOND, GET A TOILET BRUSH AND SCOUR UNDER THE TOILET RIM AND DOWN THRU THE BOWL AS FAR AS POSSIBLE. USE " Comet Bathroom Cleaner", "Soft Scrub Original", "Bon Ami". BY ENSURING U HAVE THE CORRECT WATER LEVEL AND THE HOLES UNDER THE RIM AND THE BOWL IS CLEAN, THE FLUSH SHOULD IMPROVE. DON'T FORGET TO MAKE SURE THE FLAPPER VAVLE OPENS AS IT SHOULD TO ALLOW WATER TO FLOW INTO THE BOWL EFFICIENTLY.

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2 Answers

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With the toilet clean, try a large shop vac and see if that will unplug it , I had to do that when my son had flushed a toy and it was stuck. If that wont work you will have to pull the toilet.

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1 Answer

My toilet does not flush properly. It seems to


You might check under the rim of the toilet, there are about 12 little holes that when you flush water comes out to start the most important part of the flush. The swrill, with out it hard to flush. Talk a piece of wire hanger ( I know "NO WIRE HANGERS") and use it to push up into the holes. Hard water deposits sometimes build up there.

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2 Answers

My toilet flushes very slowly. If I hold the handle down it is better, but still not right. I was on the roof and checked the vent, it is clear. I replaced the toilet, the old one was a cheap one that...


No. There is either a partial blockage between the floor flange and main stack or you have not installed the toilet properly and the wax seal has squeezed wax over the outlet hole. Always clean all old wax off of flange before installing new seal.

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If this is a new development, then you have a partially clogged drain or maybe a crack in the bowl assembly. If the toilet always did this, then perhaps the drain pipe was not installed correctly.

I would remove the toilet and run a snake through to the main stack. If you find that is clear, check the bowl for cracks and check the tank water level to be sure that the tank is filling to the water line on the tank

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1 Answer

Master bath toilet replaced with a Cimmeron class 6 confort height toilet. The master bath toilet backs up to the hall bath toilet - same wall. The hall toilet is very old. When the old toilet is flushed,...


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.

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