Five year old Toto toilet has developed a very slow flush in the past few weeks. Plumber has found no clog in line and water from hose flows freely with no back up. We have two other similar Toto toilets that function well. What might be the problem?

this could be a partial clog in the trap of the bowl...try a toilet augger...if this does not work...invest in a new toilet...you can get a pretty good one at lowes for very cheap...

If the snake won't reach, it is not the toilet, but rather in the wasteline. if the qtips were the sort with paper stems and not plastic, you can use a bacterial enzyme drain opener to clear the clog over a few days. qtips should not have clogged the line. You likely have some buildup on the inside of your wastelines that will be cleaned out by the bacterial treatment. The chemical solutions are not as thorough as the bacterial and they are quite hard on sewer and septic systems.

Don't know if you have calcium build up problems. If you do you could pour a calcium cleaner into the tank to try and clear up the problem. This would be the only way to possibly clean the enclosed area. Good Luck. Jeff

Not being a plumber by trade I don't want to bad mouth what your plumber had to say but there may be other things to consider.
If the toilet does not flush directly into the main drain there is the possibilty that the coupling between the main drain and the toilet drain is under-sized which could cause reduced water flow and your toilet not flushing completely.

If water won't go down, you have an obstruction. It might be up inside the trap of the toilet. Use a closet auger to try to remove it. If the toilet trap is clear, you either have a clogged stack or vent.

Yes adjust the float level to raise the amount of water in the tank, If you have a float that is a ball around the tank you will have to turn the water off and remove the hose from the tank and remove the nut then pull the water float device out and you will see a clap on the bottom of the float you will turn the float base so that it gets longer, increase it by two inchess so that you increase water flow. Reinstall into the tank hook it all back up and leave the lid off turn on the water and watch the water level rise be sure the float shuts the water off before it over flows, if it starts to over flow then fush it to bring the water down giving you enought time to shut off the water valve.
There is a problem adding low water systems to older septic systems. The septic pipe settles in the ground over time and may cause a ~~~ in the pipe thus causeing blockage. For future reference you can add a one gallon bottle of water in the tank like a milk jug or a used up bottle of puerified water that you have drank and this will decrease it by one gallon per flush. Hope this helps. If you need more asstance just posttothis reply!

Sorry, but the only reasonable solution is to assume that the toilet was installed incorrectly and the wax seal misplaced. Or the sewer line is clogged. I would remove the toilet and take a look-see. A plumber could use a snake to check for obstructions.

I am not a plumber but stumbled across the solution on my own. While watching the float during the flush cycle, it was obvious that it was very slow in moving downward along with the water level in the tank. The problem was that the small opening in the float chamber was partially clogged. Using just my fingers, I reached under the float chamber and cleaned off any debris that was blocking the opening underneath the float chamber. Put the float back on, and instantly the problem was solved. The tank fill started immediately after I flushed.

Remove the tank lid and look at the fill valve. Is it a yellow valve?
This fill valve is common on the Toto Toilets and can easliy plug with debrie.

They can be disassmbled and cleaned. however, I usually just replace the valve with Fluid Master Fill valve.
You will also want to check the water coming into the toilet by turning off the water that supplies the toilet and disconnecting the water supply line. After removing the water supply line turn on the water at the valve to make sure that the water is flowing properly. Check the supply line also to make sure it is not plugged.
Be sure and place a small container to catch the water that will come from the valve. A towell will also help from making too much of a mess.
If the Supply line and the valve are clear the problem is in the fill valve.
The G-Max system denotes the Flushiing system which is a 3" flapper that allows the water from the tank to flow into the bowl quicker.
Good Toilets!

sanray

it sounds to me as though its the ballvalve not shutting off properly & when it does shut off the noise you hear is a water hammer, and my guessing is you have a water meter with a back flow prevention valve fitted so when the ballvalve shuts off the pressure exerted on the valve cant go anywhere due to the back flow unit so the noise is the water reverberating through loose pipe-work, annoying but not damaging