The cause of a slow toilet leak is often a flapper that has hardened with age and no longer makes a watertight seal.
Toilet flapper seal leak.
One of the common causes of a leaking toilet is a bad flapper on the flush valve.
A toilet flapper is the part of your toilet that seals the opening between the tank and the toilet bowl.
What causes flapper leaks.
First the flapper can either be out of position.
Remove the toilet tank lid and place it in a safe location.
There are two major causes of flapper leaks.
Flapper or flush valve seal.
If it is then it won t provide the optimal seal that your toilet s outlet requires to keep the water from passing through.
Tower or canister style flush valves will have a flat seal in place of a traditional flapper.
This may occur because the trip lever arm may be binding water may be overflowing into the flush valve overflow tube or the flush valve flapper canister seal may be worn.
When the toilet is flushed a rubber tank ball or flapper lifts out of the way and water rushes into the bowl.
Secondly the flapper could be damaged.
The flapper aka flush valve seal is the plug that falls against the drain hole flush valve drain seat on the bottom of the tank and holds water in until the next time you flush.
Flapper leaks are the most common leak point and always leaks directly into the bowl.
This troubleshooting document relates to one or two piece toilets.
Too much overuse can cause wear and tear to your toilet s.
Because these flappers are constantly exposed to the water inside the toilet tank they can eventually begin to wear out.
An old worn tank ball or flapper is prone to leaks and the best way to fix it is to replace it.
Why is my toilet occasionally leaking or running.
Flappers aren t difficult to replace but some.
Vaseline to stop a toilet leak.
With this issue toilets run or leak because water is leaking out of the tank.
If you hear your toilet refilling too often or if you hear the steady hiss of running water the flapper may be leaking.