Fed Up with a Running Toilet? Here’s the Quick Fix You Need: How to Fix Running Toilet Fill Valve

A running toilet is more than just an annoyance—it can waste gallons of water and increase your utility bills. The culprit is often a faulty fill valve, which controls the flow of water into the tank. Fixing a running toilet fill valve is a relatively simple task that can save you money and frustration.

Identifying a Faulty Fill Valve

The first step in fixing a running toilet is to identify if the fill valve is the problem. Here are some telltale signs:

• The toilet tank keeps filling, even after the water level has reached the proper height.
• The toilet bowl constantly overflows.
• The fill valve is making a hissing or gurgling sound.
• The water level in the tank is too high or too low.

Tools and Materials Required

Before you start, gather the following tools and materials:

• Adjustable wrench
• Phillips screwdriver
• New fill valve (if needed)
• Plumber’s putty (optional)

Step-by-Step Instructions

1. Turn Off the Water Supply

Locate the water supply valve behind the toilet and turn it off clockwise. Flush the toilet to drain the tank.

2. Disconnect the Water Supply Line

Use an adjustable wrench to disconnect the water supply line from the fill valve.

3. Remove the Old Fill Valve

Unscrew the nuts holding the fill valve in place using a Phillips screwdriver. Carefully lift the fill valve straight up to remove it.

4. Inspect the Fill Valve

Check the fill valve for any visible damage or wear. If it appears to be in good condition, you may be able to simply clean or adjust it. Otherwise, you will need to replace it.

5. Install the New Fill Valve (if needed)

If you need to replace the fill valve, apply a thin layer of plumber’s putty to the base of the new fill valve. Insert the fill valve into the tank and tighten the nuts finger-tight. Use the adjustable wrench to further tighten the nuts, but avoid overtightening.

6. Reconnect the Water Supply Line

Attach the water supply line to the fill valve and hand-tighten the connection. Use the adjustable wrench to fully tighten the connection.

7. Turn On the Water Supply

Slowly turn on the water supply valve and check for any leaks. If there are no leaks, flush the toilet to fill the tank.

Troubleshooting Tips

• The toilet is still running: Adjust the water level by turning the adjustment screw on the fill valve.
• The water level is too high: The float may be set too high. Adjust it by bending the float arm slightly downward.
• The water level is too low: The float may be set too low. Adjust it by bending the float arm slightly upward.
• The fill valve is hissing: The diaphragm may be worn or damaged. Replace the diaphragm or the entire fill valve.
• The fill valve is gurgling: There may be air in the water line. Flush the toilet several times to purge the air.

Wrap-Up: The End of a Running Toilet Nightmare

Fixing a running toilet fill valve is a simple and effective way to save water and money. By following these step-by-step instructions, you can easily diagnose and repair the problem, restoring your toilet to its proper function.

Basics You Wanted To Know

How much does it cost to fix a running toilet fill valve?

The cost of fixing a running toilet fill valve depends on the type of fill valve you need and whether you hire a plumber. If you do it yourself, the cost of a fill valve ranges from $10 to $30.

How often should I replace my toilet fill valve?

Fill valves typically last for several years, but they may need to be replaced sooner if they are damaged or worn. If you notice any signs of a faulty fill valve, it’s best to replace it promptly.

Can I fix a running toilet without replacing the fill valve?

In some cases, you may be able to fix a running toilet without replacing the fill valve. Try cleaning the fill valve, adjusting the water level, or replacing the diaphragm. If these measures don‘t work, you will likely need to replace the fill valve.