According to The Water Scrooge, one in five toilets has a leak. This common issue, which may not even be noticed until the water bill arrives, can lead to thousands of gallons wasted each month, costing households significantly more in utilities.

Today, we’re taking a closer look into the causes and solutions for a toilet running intermittently, with expert tips to help you save water and avoid unnecessary expenses.

Understanding the Causes of Toilet Running Intermittently

A toilet that runs intermittently can be traced back to a few common causes. Identifying these early can save water and reduce utility costs. Here are three main reasons why a toilet might start running intermittently:

• A worn-out flapper
• A faulty fill valve
• An improperly adjusted float

Worn-out Flapper

The flapper is a rubber seal that controls water flow from the tank to the bowl. Over time, the rubber can degrade, causing it to lose its seal.

When the flapper doesn’t sit tightly, water leaks slowly into the bowl, triggering the toilet to refill periodically. Replacing the flapper is often a straightforward fix that can resolve intermittent toilet issues.

Faulty Fill Valve

The fill valve works in the refilling process after each flush. So it can also be a culprit. If this valve isn’t functioning correctly, it might not shut off completely.

It leaves the water running and causes an intermittent filling sound. A fill valve can often be adjusted or replaced easily.

Improperly Adjusted Float

The float controls the water level in the tank. If it’s set too high, water may constantly trickle into the overflow tube, causing the toilet to refill. Adjusting the float height can help maintain the right water level, stopping unnecessary water flow.

How to Stop Toilet Leaks

Fixing a running toilet often requires addressing the three main components we mentioned. Each of these parts can be adjusted, repaired, or replaced, depending on the issue. These fixes are typically straightforward and can often be done with basic tools and a bit of patience.

Flapper Replacement

The flapper is a common source of intermittent toilet issues. It the part if damaged or worn down, meaning there isn’t a good seal anymore, water can leak from the tank to the bowl. That results in the toilet refilling periodically.

Replacing the flapper is usually simple. First, shut off the water to the toilet. Then you’ll want to unfasten the flapper from the chain and arms. Bring the old flapper to the store to make sure you buy a matching replacement.

Once you have the new flapper, install it by hooking it back onto the chain and arms. Turn on the water, let the tank fill, and check to ensure the toilet is no longer running.

Adjusting or Replacing the Fill Valve

If the toilet continues to run even after the flapper is replaced, the fill valve could be the issue. The fill valve controls water flow to the tank after each flush.

If it’s faulty, the water won’t shut off, and the tank may keep filling. Start by inspecting the valve and adjusting it if possible; many fill valves can be adjusted by twisting the valve stem or moving a small lever.

If adjusting the valve doesn’t stop the running, replacing it may be the best solution. This process involves turning off the water, removing the faulty fill valve, and installing a new one. Once replaced, turn on the water and check that the tank fills properly.

Setting the Float Correctly

If the float is sitting too high, it can cause water to seep into the overflow tube. And that makes the toilet run. To fix it, you’ll need to find the adjustment screw or clip on the float arm.

Lowering the float will reduce the water level in the tank, preventing the overflow. It can save water and eliminate intermittent toilet issues. After adjusting the float, flush the toilet a few times to ensure the water level stays below the top of the overflow tube.

Preventing Future Toilet Problems

Preventing your toilet from running intermittently often requires a few simple maintenance habits. Regular checks and minor adjustments can help extend the life of your toilet parts and avoid unnecessary water waste.

Routine Flapper Inspections

Since the flapper is prone to wear, it’s a good idea to inspect it every few months. A quick check can reveal if it’s starting to warp or degrade. Replacing a worn flapper before it fails entirely can prevent leaks and maintain your toilet’s efficiency. A fresh flapper keeps water in the tank where it belongs, helping prevent the toilet from running intermittently.

Keeping the Tank Clean

Sediment buildup is another common cause of intermittent toilet issues. Over time, minerals from the water can collect in the tank, clogging parts or reducing their efficiency.

Cleaning the tank regularly can prevent these deposits from affecting the fill valve or other components. Simple cleaning tablets made for toilets can help break down minerals, keeping the tank’s water clear and reducing the need for more intensive cleaning.

Scheduling Routine Plumbing Inspections

Scheduling a routine inspection with a plumber once a year can help catch minor problems before they become bigger issues. A professional can inspect the internal mechanisms of your toilet and recommend adjustments or replacements.

When to Call a Professional for Intermittent Toilet Issues

There are a few situations where calling an expert is the best choice. These include persistent leaks, unusually high water bills, or complex repairs that go beyond simple adjustments or part replacements. In these cases, a professional can identify underlying issues that might not be obvious, such as hidden leaks, worn pipes, or internal damage to the tank.

Professional plumbers bring tools and expertise that make it easier to diagnose problems quickly and accurately. They can also provide long-lasting solutions, which may save money on future repairs and help avoid wasted water from undetected leaks.

Toilet Repair Tips

Addressing a toilet running intermittently can save water, lower utility bills, and prevent potential damage.

Since 2004, Suburban Plumbing has been a trusted name by customers looking for help with plumbing in Orange County, CA. Locally owned and led by Master Plumber Johnnie Maynard. We deliver quality solutions with expert service for residential and commercial needs.

Get in touch today to find out how we can help with your running toilet!