Now hiring licensed journeyman plumbers – apply now at Flush & Rush – always hiring to grow – never to replace – that says a lot!

Now hiring licensed journeyman plumbers – apply now 

Schedule Service

How To Fix Common Causes of a Running Toilet

running toilet

Why Your Toilet Keeps Running

If your toilet is running long after you’ve flushed, you’re not alone. A running toilet is one of the most common plumbing problems a homeowner can face. In fact, learning about the common causes of a running toilet can help you understand why it happens and what to do about it. Not only is the sound of running water irritating, but it can also waste many litres of water every day and increase your water bill.

The main reason a toilet continues to run is usually inside the toilet tank, where a few small toilet parts control the amount of water flowing in and out. When one of these parts becomes faulty or worn out, the tank doesn’t refill properly, and the toilet won’t stop.

Common Causes of a Running Toilet

Several things inside the tank can cause water to keep flowing into the toilet bowl:

  • Worn rubber flapper: The toilet flapper (the rubber seal at the bottom of the tank) may not close tightly, letting water leak into the bowl.
  • Chain is too long or tangled: If the chain that lifts the flapper during a flush is loose, the flapper may not seal when you flush your toilet.
  • Float problem: A float ball that is set too high or stuck will keep water flowing and cause the overflow tube to run constantly.
  • Fill valve fault: A faulty fill valve or flush valve may not shut off properly, keeping water in the tank at the wrong level.
  • Overflow issues: If the tube height is wrong or the overflow pipes are damaged, excess water spills back into the bowl.
  • Older toilet parts: An older toilet may have worn parts that warp or crack over time and simply need replacing.

 

Any of these problems can mean your toilet constantly runs, wasting water and causing frustration.

How to Fix a Toilet Tank That Won’t Stop Running

The good news is that many of these issues have simple DIY fixes. Here’s how you can stop your toilet from running:

  1. Lift the toilet tank lid: Take off the lid and look inside to spot obvious issues like a stuck float, a chain caught under the flapper, or water spilling into the overflow tube.
  2. Check the flapper: Push down gently on the flapper. If the running stops, it isn’t sealing properly. Unclip the chain from the flush lever, slide the flapper off the pegs, and replace it with a new one. Make sure the chain has just a little slack when reattached.
  3. Adjust the float: If the water level is too high, adjust the float so the water stops about 2.5 cm (1 inch) below the top of the overflow tube. On newer toilets, turn the adjustment screw on the fill valve. On older ones with a float arm, gently bend the arm downward.
  4. Inspect the fill valve: Flush the toilet and watch the fill valve. If water keeps running even when the float rises, the valve is faulty. Shut off the water supply, unscrew the old valve, and install a new one. Reconnect the refill tube and tighten the nut underneath to prevent leaks.
  5. Check the chain length: If the chain is too long, it can get caught under the flapper. Shorten it so it hangs with a small amount of slack and doesn’t snag.
  6. Look at the overflow tube: Make sure it’s the right height and not cracked. The water level should stop just below the top. If the tube is damaged, it may need replacing.
  7. Shut off the water supply if needed: If you can’t solve the problem right away, turn the valve near the floor clockwise to stop your toilet from wasting water until repairs are made.

 

Even small issues like a chain that is too long or a tube that is too long inside the tank can keep the toilet from sealing properly.

When to Call a Plumber for Toilet Repairs

If you’ve tried DIY adjustments and your toilet continues to run, it may be time to get professional help. A plumber can diagnose hidden problems such as a cracked seal, warped plastic or rubber parts, or a malfunction in the fill valve that isn’t obvious.

Sometimes, replacing a flapper or making a small adjustment is enough. Other times, an older toilet may require new parts or even a full toilet tank repair. A professional plumber can ensure the labour and parts are done correctly the first time, preventing further leaks that could cause water damage or even reach the sewer.

As a homeowner, you don’t want to waste too much water or risk costly damage. If you’re dealing with the common causes of a running toilet and you’re not comfortable with repairs, or the problem seems too complex, you’re often better off calling a plumber who can help quickly and efficiently.

Need help today? Contact Flush and Rush, and we’ll send a qualified plumber to stop your toilet from running and restore peace of mind

FAQs

WHAT’S CAUSING MY TOILET’S TANK TO KEEP RUNNING?

A toilet that won’t stop usually has a part in the toilet’s tank that isn’t working properly. It could be the rubber seal, the float, or the fill valve not shutting off.

To fix your running toilet, start by lifting the lid on the toilet’s tank and checking the flapper, float, and chain. Often, a quick adjustment or replacing a worn part will fix the problem.

If the chain is too long, the flapper may not close, and if it’s too short, the flapper may not open properly when you flush. Either way, it can cause the toilet to keep running.

Many small issues can be solved with DIY adjustments. But if you can’t fix the problem or the toilet keeps wasting water, it’s best to call a plumber.

After you adjust or replace parts in the toilet’s tank, flush the toilet and watch the water level. If the toilet’s bowl refills correctly and the running stops, you’ve managed to fix the problem.

Schedule a Service today

Town
Max. file size: 5 MB.