Key Takeaways
- A toilet that keeps running wastes thousands of liters of water each year and increases your bill.
- Common causes include a loose flapper, faulty fill valve, or tangled chain inside the tank.
- You can fix small issues like adjusting the float or changing the flapper yourself.
- Regular cleaning and yearly plumbing checks from Blue Sea Plumbing help prevent leaks and keep the toilet working right.
Homeowners think that running water in the toilet is normal. It is not. When water does not stop it means something is wrong inside the tank.
If your toilet won’t stop running it can waste up to 200000 liters of water each year. You may not see it but your water bill will show it.
In this blog Blue Sea Plumbing will explore the reasons your toilet keeps running after flush and how to stop a running toilet with simple fixes.
Misaligned Flapper Valve
It is a small rubber part inside the toilet tank. It lifts when you press the handle. This lets the water move from the tank into the bowl. When the tank is empty the flapper falls back down to stop the water.
After some time the flapper can get old or move out of its place. If it does not sit right water slips through the gap. The tank then fills again and again. You may hear water flow even when no one used the toilet.
One of the easiest running toilet fixes is to replace the flapper. You can buy it from any store that sells tools. It costs little and does not need special help.
Faulty Fill Valve
It helps the tank get water after each flush. It has a small float that moves up and down with the water. When the float goes up the water stops and vice versa.

If the float stays too high the tank fills too much. Water then moves into the small pipe and never stops. You will hear water flow all the time.
You can fix this by moving the float a little lower. If the valve looks old put in a new one. This fix is easy and takes only a short time.
Leaky Flush Valve Seal
It is located at the bottom of the tank. It keeps the water inside until you flush. If this seal gets rough then water slips through it. The tank then keeps filling again and again.
You can check for a leak in a simple way. Put a few drops of food color in the tank. Wait for some time. If you see the color in the bowl, the water is leaking.
You can change the seal yourself if you know how. If not then call emergency plumber to check the flush valve and overflow tube.
Tangled Chain
There is a small chain inside the toilet tank. It joins the handle to the rubber flapper. When you press the handle the chain lifts the flapper so water can move into the bowl.
If the chain is too short the flapper cannot close well. If it is too long it may get stuck under the flapper. In both cases water does not stop and keeps moving.
You can fix this by making the chain a bit loose but not too loose. The flapper should drop back in place after each flush so the water stops flowing.
High Water Pressure
The water in your home moves with pressure. If this pressure is too strong the parts inside the toilet can wear out fast. The fill valve may open and shut too quickly. This can make water leak into the bowl again and again.
Blue Sea Plumbing can check the pressure and clean the tank. This keeps the toilet safe and stops more damage later.
Tips to Prevent a Running Toilet
Here is what can be beneficial for you.

Keep the tank clean
Dirt and white marks can build inside the tank. They block parts and make them weak. Use soap and a brush to clean the tank. Do this once or twice a year.
Check for leaks
Put a few drops of food color in the tank. Wait for some time. If you see color in the bowl water is leaking. Fix it fast so you do not waste more water.
Ask for a yearly check
You should have a plumber inspect your toilet annually. Leaks can often cause a smell in the house. You can read our post on how to fix a sewage smell in house to learn more.
Our team can check the toilet and make sure your home smells fresh again. Call us for quick help today.
FAQs
Which tools do I need to fix the toilet?
You can use
- Pliers
- Wrench
- Flapper
To stop the water. Keep a towel as well in case of splashes.
When should I call a plumber?
If you fix all the parts and the toilet still runs it means there is a bigger problem. A plumber can check it better.
A running toilet and a gurgling one often share the same underlying cause — check out our guide on what causes toilet gurgling and how to fix it if you’re hearing strange noises too.





