There could be several reasons behind it but the followings are the most common reason.
American standard toilet doesn t flush well.
If the tank is empty the toilet will not flush.
But if the flapper is old or damaged or that chain isn t set to an appropriate length water will slowly leak out of the tank.
Problematic flapper of the toilet.
And this decreases the amount of water available when you need to flush.
When the toilet isn t in flush mode the flapper s job is to seal off that hole completely so that water doesn t escape the tank.
If so break through the plastic with a screwdriver and pry out the pieces and that toilet will work just fine.
The toilet is clogged.
The toilet is clogged.
When the water level in your toilet s tank is too low your toilet won t flush properly.
Each flush only uses 1 6 gallons of water.
Before you begin the steps to determine what caused the problem it is essential that the bowl is clean.
Using a toilet bowl cleaner for example lime a way or clorox hold the flapper open and pour 1 2 cups of cleaning solution down the flush valve opening.
Using too much toilet paper or attempting to flush anything other than toilet paper down the toilet can clog the pipe and make further flushing impossible.
The valve for this is usually on the wall behind the toilet bowl.
Sanitary napkins are a common culprit behind clogs like this.
Low water level in the toilet tank.
If you can t see a rubber cap clamped on the vent over the bathroom from the ground climb up on the roof and inspect the end of the vent over your bathroom and i ll bet you ll find an overlooked plug.
Turn the water supply valve off.
Holding the flapper open see picture below let the majority of the water fall out of the tank.
Every toilet has a water level mark that indicates exactly where the water should be.
The toilet is not flushing properly.
The tank is filled with water from the supply line running into your toilet tank.
Not to mention it is irritating and when you flush multiple times it is a wastage of water as well.
Cleaning the rim feed holes and jet holes of your toilet.
The national energy policy act of 1992 stated effective january 1 1994 that all water closets shall be 1 6 gallons per flush maximum.