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How to Fix a Running Toilet: The Ultimate Guide to Stopping the Flow

A running toilet can be a frustrating problem that wastes water and raises your utility bills. If you’ve ever heard that constant hissing or trickling sound long after you’ve flushed, you know exactly what we’re talking about.

Fortunately, fixing a running toilet is often easier than it seems, and in most cases, you won’t need to call a plumber. Whether the issue is a faulty flapper, an improperly set float, or a fill valve problem in the toilet cistern, this guide will walk you through the steps to get your toilet back in working order.

With a few simple tools and a little know-how, you’ll be able to stop the constant running and save yourself some money along the way. Let’s get started and fix that running toilet.

Identify the Cause of the Running Toilet

Before you can fix a running toilet, it’s important to figure out what’s causing the problem. There are a few common culprits that can lead to constant water running.

The most typical cause is a worn-out flapper, the rubber piece at the bottom of the tank that controls water flow into the bowl. If it doesn’t seal properly, water will continuously flow. Another possibility is that the float is set too high, causing excess water to fill the tank and spill into the overflow tube.

You might also be dealing with a faulty fill valve, which controls the water entering the tank. If this component malfunctions, it can cause water to run even when the tank is full.

To pinpoint the issue, start by removing the toilet tank lid and watching how each component works after flushing. Once you’ve identified the cause, you’ll know what to repair or replace to stop your toilet from running. Simple fixes can often make all the difference.

Tools to fix a running toilet

Tools You’ll Need

Before you get started on fixing your running toilet, it’s important to gather the right tools. Luckily, you won’t need anything too fancy − just a few basic items that you probably already have around the house.

Here’s a quick list of tools that will come in handy:

  • Adjustable wrench – Perfect for tightening or loosening bolts without damaging the components.
  • Screwdriver – Some toilet parts, like the fill valve, may need adjusting or removal using a screwdriver.
  • Pliers – Useful for gripping small parts or holding bolts in place while you work.
  • Bucket or towel – Always helpful for catching any water that may spill when you’re working in the tank.
  • Replacement parts – Depending on the cause of the problem, you might need a new flapper, fill valve or float.

With these tools ready, you’ll be set to tackle the most common running toilet issues. Just remember to turn off the water supply before you start.

Step-by-Step Guide to Fixing a Running Toilet

Fixing a running toilet doesn’t have to be complicated. Follow these simple steps to tackle the most common causes:

  1. Turn off the water supply: Before you begin, locate the shut-off valve behind the toilet and turn it clockwise to stop the water flow.
  2. Check the flapper: Remove the tank lid and inspect the rubber flapper. If it’s worn, bent, or not sealing properly, water will keep flowing. Replace the flapper if necessary.
  3. Adjust the float: If the water level is too high, it could be spilling into the overflow tube. Adjust the float so the water stops about 1 inch below the top of the overflow tube.
  4. Inspect the fill valve: If adjusting the float doesn’t help, the fill valve might be the issue. Replace the fill valve if it’s malfunctioning or not shutting off the water properly.
  5. Turn the water back on: Once you’ve made your adjustments, turn the water supply back on and test the toilet to ensure it’s no longer running.

These steps should resolve most running toilet problems.

When to Call a Professional

While many running toilet issues can be easily fixed with basic tools and DIY know-how, there are times when it’s best to call a professional plumber.

If you’ve tried adjusting the float, replacing the flapper, or fixing the fill valve and the toilet is still running, the problem may be more complex. Issues like a cracked tank, corroded parts or damaged internal mechanisms often require expert attention.

Additionally, if you’re not comfortable working with plumbing components or notice any water leaking outside the toilet, calling in a pro can save you from bigger problems down the road.

Persistent leaks can cause water damage or lead to higher utility bills, and a professional can quickly assess and fix the problem. It’s also worth seeking help if you have an older toilet with outdated parts, as finding the right replacements can be tricky. In these cases, a plumber will know exactly what to do to get your toilet back in top shape.

A man calls a plumber due to a running toilet

Preventing Future Toilet Issues

Once you’ve fixed your running toilet, it’s smart to take steps to prevent future problems. Regular maintenance can help keep your toilet in top shape, avoiding wasted water, potential blockages and other problems.

Here are a few simple tips:

  • Inspect the flapper regularly: Flappers can wear out over time, so check it every few months to ensure it’s sealing properly. Replace it if it shows signs of damage or wear.
  • Adjust the water level: Keep an eye on the water level in the tank. If it’s too high, it may cause the toilet to run. Adjust the float to ensure the water stays below the overflow tube.
  • Clean the components: Mineral buildup can affect the performance of your toilet. Clean the inside of the tank and components like the fill valve and flapper to ensure they function smoothly.
  • Fix leaks promptly: If you notice any leaks or unusual behaviour, address them right away. Small issues can quickly escalate if ignored.

By following these simple tips, you can avoid future running toilet headaches.

Stop the Annoying Water Trickle

Fixing a running toilet doesn’t have to be a stressful experience. With a little bit of know-how and the right tools, you can easily stop the constant water flow and save yourself from high water bills.

Whether it’s adjusting the float, replacing a worn-out flapper, or addressing a faulty fill valve, the solutions are often straightforward and quick. Plus, by performing regular maintenance and checking for common issues, you can prevent future toilet troubles from happening in the first place.

However, if the problem seems too complex or you’re not comfortable making the repairs yourself, don’t hesitate to contact a qualified plumber. They can quickly assess and fix the issue before it leads to more serious damage.

By following this guide, you’ll have a better understanding of your toilet’s inner workings and feel confident tackling any running toilet problem that comes your way.

Please note: This information is provided for advice purposes only. Regulations differ from state to state, so please consult your local authorities or an industry professional before proceeding with any work. See our Terms & Conditions here.

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