Slow or incomplete flushing. Without proper venting, the water is pulling against a vacuum.
partially clogged drain or vent, improperly installed vent or drain
Yes if the vent pipe is 4" and vertical by code and there is nothing connected between your toilet tee and where you would connect your new toilet tee. If not worried about codes then yes you can connect to a 3" vent line if no other vent lines are connected down stream. If you have a vent pipe that is less then 3" and or you have other vents connected between your old toilet tee and your new toilet tee then NO you can not connect a new tee for your toilet.
Yes. If not it will be a wet vent and cause MAJOR problems.
Within 24 "
Yes.
partially clogged drain or vent, improperly installed vent or drain
Clogged drain or toilet. Also check the vent holes under the rim and clean the out.
Yes a clogged VENT pipe can cause a sluggish drain
Drain is partially clogged or the vent pipe is stopped up. Also check the vent holes underneath the rim of the toilet and clean them out.
It could be a bad wax ring. I would start by replacing that. also check the vent on the roof to see if it is clogged with anything
This could be caused by either a clogged vent line or lack of vent to outside atmosphere. It sounds like your drainage system is starving for air and is trying to pull air from the path of least resistance, the toilet. Also, it may be caused by the drain line itself being partially clogged
Toilets that bubble when flushed and drain slowly can be cause by different things, such as port holes that are clogged, a clogged drain line, the tank has a low water level, or a problem in the vent pipe. A plumber can check for the specific problem and fix it.
Vent hole or holes are located under rim of toilet.Best way to see it is with small mirror.Take clothes hanger and make sure all holes especially the large ones are not clogged .They will become clogged from time to time.
When a basin drains and causes gurgling sounds in other basins -- or the toilet, in this case -- it is usually a sign that a vent pipe is clogged or obstructed. The air being displaced in the drain pipe of the bathtub has nowhere to go if the vent is clogged and is being forced up through other drain pipes.
Yes
Your problem can be caused by problems other than improper venting. A bad fill valve, a cracked toilet, a partially clogged toilet, or even a clogged drain line. Has this problem just started or has it been as long as you can recall. If it is an old problem it may be vent related... new it is most definitly something else.
If your vent dryer is clogged there will be no heat coming out. It will also take longer for things to dry.