Troubleshooting Toilet Plumbing Problems

Why Does My Toilet Keep Running?

If you’ve ever found yourself wondering, “Why does my toilet keep running?” you’re not alone. A continuously running toilet can be not only annoying but also wasteful. The good news is that most of the common reasons for a running toilet can be easily identified and resolved. In this article, we will delve into the various causes of a running toilet and provide practical solutions to fix this common household issue.

Understanding the Basics


What is a Running Toilet?

A running toilet is a situation where water continuously flows into the toilet bowl or tank even when it’s not being used for flushing. This can result in a higher water bill and potential damage to the toilet’s components if left unattended.

Why is it Important to Fix?

Addressing a running toilet is crucial for several reasons:

  1. Water Conservation: Running toilets waste a significant amount of water, contributing to higher water bills and environmental concerns.
  2. Cost Savings: Repairing a running toilet can lead to substantial savings on your monthly water bill.
  3. Preventing Damage: Prolonged running can damage the toilet’s internal components, requiring expensive repairs or replacements.

Now, let’s explore the common causes of a running toilet and how to troubleshoot each issue.

Identifying the Culprits

1. Flapper Valve Problems

The flapper valve is a common culprit behind a running toilet. If it’s not sealing properly, water will continue to flow into the bowl.

Solution: Check the flapper for damage or misalignment. Replace it if necessary to ensure a tight seal.

2. Float Ball Issues

A malfunctioning float ball may not trigger the shut-off valve when the tank is full, causing water to keep flowing.

Solution: Adjust the float ball’s position or replace it if damaged.

3. Fill Valve Malfunction

A worn-out fill valve can lead to water continuously filling the tank beyond the required level.

Solution: Replace the fill valve to control the water level accurately.

4. Chain Problems

The chain connecting the flapper to the flush handle can get tangled or too tight, preventing the flapper from sealing properly.

Solution: Adjust the chain’s length, ensuring it has some slack for smooth operation.

5. Mineral Buildup

Over time, mineral deposits can accumulate around the flapper and other components, interfering with their function.

Solution: Clean the affected parts to remove mineral buildup.

6. Overfilled Tank

In some cases, a toilet tank may be overfilled due to an incorrectly set water level.

Solution: Adjust the water level in the tank to the recommended level.

7. Faulty Flush Valve

A defective flush valve can result in water constantly leaking into the bowl.

Solution: Replace the flush valve to ensure a watertight seal.

8. Cracked Toilet Bowl

A crack in the toilet bowl can cause continuous leakage.

Solution: If a crack is detected, it’s best to replace the entire toilet.

9. High Water Pressure

Excessively high water pressure can prevent the fill valve from closing properly.

Solution: Install a pressure regulator to control water pressure.

A running toilet is a common household issue, but it’s one that can be easily resolved with the right knowledge and tools. By identifying the root cause and following the appropriate solutions, you can put an end to the continuous flow of water and save on your water bill. Remember, timely maintenance can prevent more significant problems down the road.


  1. How much water does a running toilet waste? A continuously running toilet can waste hundreds of gallons of water per day, leading to a significant increase in your water bill.
  2. Can a running toilet cause damage to my bathroom floor? Yes, prolonged leakage from a running toilet can damage the floor around the toilet and even seep into the subfloor, causing structural issues.
  3. Why does my toilet run intermittently? Intermittent running may be caused by a faulty flapper or chain that occasionally gets stuck or tangled.
  4. Should I call a Bristol plumber to fix a running toilet? Most running toilet issues can be resolved with DIY solutions. However, if you’re unsure or the problem persists, it’s advisable to seek professional plumbing assistance.
  5. How can I prevent a running toilet in the future? Regularly inspect and maintain your toilet’s components to catch and address issues early. This includes checking the flapper, fill valve, and flush valve for wear and tear.
Troubleshooting Toilet Plumbing Problems
Scroll to top