We just replaced out toilet because we had no flushing power on the old one. After cleaning the vent pipe and using a snake and putting on the new toilet, we still don't have any pressure when flushing the toilet. Any other suggestions?

From what I have read on this website from people who seem to know, it could be a number of things:
1. A clogged stack or vent.
2. An old flapper valve.
3. An old fill valve.
4. Not enough water going from the tank to the bowl.
5. The float chamber itself is clogged.
6. Old piping (plumbing).
7. The house and therefore the plumbing is settling.
8. After watching You Tube on how to do it, try a hand snake, and if that doesn't work, try renting an ELECTRIC snake, not a hand snake and "snakeout" the "cleanout place," You may have to take the toilet off - sounds like a job for a plumber.
9. The trap is clogged way down deep.
9. The tank is not a match for the toilet and will not connect or seal well.
10.Toilet is old and worn out.
11. There are hard water mineral deposits in the ports of the bowl.
12. Pour a large bucket of water all at once in the toilet and IF it flushes, it is not the system, it is the toilet.

You might want to try the following first before you either rent an electric snake or call a plumber who has an electric snake. You have probably already tried the following but here they are because sometimes they work, depending on how far down the clog is:
1. Try 1/4 C of Epsom Salts and let sit for 15 minutes and then flush.
2. Pour 1 C Baking Soda in toilet and wait 5 minutes and then add 2 C white vinegar slowly to toilet, and wait 15 minutes and then flush.
3. Heat 1 gallon of hot water and while the water is heating, add 1 C liquid dish soap first (or you can use shampoo. or liquid washing machine soap like Tide in a pinch) to the toilet and then after the water comes to a boil turn off the heat and wait until it stops boiling, and then pour the hot water slowly down the toilet (you have to pour it SLOWLY as you don't want it to flush - yet) and then, wait 15 minutes and then flush.
4. Pour in 3-4 C bleach in the toilet and wait 5 minutes and then add 1 C of POWERED detergent and then wait 15 minutes and then flush.

What all that means is the sewage pipe going to the street is getting clogged so either snake it with 50 foot snake or go buy so Drain-O (60 ounce bottle costs about $9) and pour 1/5 in toilet and wait 10 minutes then pout 1/5 in Bathroom sink & wait 10 minutes. Keep do that until 60 ounce bottle is empty. Let this stay in pipes for couple hours and your toilet will double flush now its clean with no corrosion, hair, cooking oil, and other debris.

The roof vent for the toilets is shared. It is the pipe (on the roof) that lets water in the drain system. When clogged, it causes what you have. A garden hose placed in the roof vent (and turned on) may clear the blockage (could be leafs or pine straw or a dead bird). Needs to be cleared... I have used a plumbers snake with 100% success....but you may not have one...so the garden hose suggestion. Be careful on the roof.

Your sewer vent may be clogged, or if you are in the northern climates, frosted shut. When you flush the toilet the water displaces the air in the drain piping. The vent gives the air somewhere to go. If the vent is plugged the dispaced air forces it's way out through the path of least resistance( the lower toilet in this case).Pour some hot water down the vent where it comes through the roof to thaw it out.or run a snake down the vent. Hope this helps.

I would have used low power jet wash with pipe cleaning attachment when the toilet was off, I know karcher do a good 1 but there are cheaper alternatives. The last toilet I fitted had a large rubber type seal between the wate outflow pipe and the out pipe of the toilet that fitted over the base of the pipe. I have never seen a wax type seal as you describe, admittedly I have not changed many toilets, but I would have changed the seals when the tiolet was lifted. Hope this helps

Vent pipe may need cleaning out, vent stops up your system has to get air to work so it will take it from where it can get it and the toilet maybe the easied place.
You may have a vent pipe that may be partly blocked or clogged up. To check a vent pipe out you can have someone fill a sink or tub up to the flood level rim and plug the drain. Have them remove the stopper and watch the toliet you have had issues wit to see any water movement. Once you deteemine which one is the cause you can snake the vent pipe or run a water hose down the vent and turn it on to flush out the vent pipe.

Hope this will help you out.

This is a job for a plumber unless you have a ladder. The vent pipe may be plugged or the trap in the toilet may be plugged up but this requires removing the toilet from the floor which is not that hard. two floor bolts and and turn off the water valve and disconnect the water hose then lift the toilet up and see if there is blockage by poring a gallon of water into the drain pipe. if it backs up you need to snake out the main line. You can rent a electric 25 foot snake for 35 bucks but then you have to reinstall everything plus buy a new wax ring which is about 5 bucks. if the pipe is clean and drains fine then you need to run water into the toilet outside to clear the throat of the toilet if there is no blockage then the vent pipe may be plugged and that you have to get from the roof. Best bet is call a plumber.

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.

The blockage MAY be beyond the length of the snake you used. Once I had a blockage that required 145 feet of snake. ALSO the vent could be plugged by any of several things, including wasp nests.

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.