I'm currently having a problem with my toilet not flushing properly ( everything not going down ). Could this be a venting problem? How can it be fixed?
Regards, Ken

There are so many answers to this. Give more details. Age, size, children in home, type of paper used, do you use the blue stuff in the tank?
It could be the water level too low in tank, flapper closing too quickly, something clogging it, did it work well when installed? Are you using 2 ply paper? Try single ply [i know, don't say that in front of a woman]

Do you see any grey stains anywhere in the bottom of the commode. If you are in as area that has lots of chemicals in the water there is a chance that some of the stuff has collected up in the trap of the commode and is causing friction as the water tries to flush out. When it does this the water just swirls around and never really flushes.
The way I get rid of this build up is with muriatic acid. Put about a quart in the commode and let it set for an hour and then flush it out, try not to breath much of the fumes that might be put off from the acid. Do no spill any on the floor and if you get some on your hands wash it off immediately. If you have two commodes do both. Do not save any of the acid. Use it all with in a week and throw the bottle away. Again do not save any.

Do not put muratic acid in your toilet, it removes the gloss and exposes the rough surface of the toilet.

I have one that most repair plumbers miss.. Look down at the bottom of the bowl. If there is a small hole, then that is a jet that starts the syphon action. If it's clogged the water will just swirl around and slowly go down leaving solids behind. Take your finger,(UGH! ) and run it around the inside of the opening. Over the years minerals build up and cut down on the syphon (flush) action. If it is rough or you feel build up, take a table knife and put a bend in it to get around the curve in the bowl and chip and scrap it clear. Next take a coathanger and clear out the holes around the rim. They start the swirling action. And last, check the water level in the tank. It should be 1/2" below the top of the over flow tube. And speaking of the overflow tube, Make sure the small 1/8" tube from the ballcock to the white overflow tube is connected so it discharges in it and that it's flowing when the ballcock fills. This is what raises the water level in the bowl. For a good solid flush they all have to work together. Hope this helps . Tom

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Originally Posted by doug238

do not put muratic acid in your toilet, it removes the gloss and exposes the rough surface of the toilet.

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When In was a boy in my fathers plumbing shop up in Wisconsin we had bad problems of toilet bowls liming up. My job was to take them out in the ally and boil the lime out using muratic acid. While it got rid of the lime without damage to the finish of the bowl I can't say the same for my lungs.
The fumes scarred my lumgs and to this day I have to explain to insurance companies that I didn't have TB. DO NOT use muratic acid to clean your toilet bowl and especially in a enclosed space such as a bathroom. Listen to me! I speak from experience. Tom