A toilet that keeps running is more than an annoyance—it wastes a lot of water and drives up your bill while putting extra strain on the environment. The good news is that most running toilets can be fixed by a homeowner with a little direction. This guide walks you through the usual culprits and the steps to silence the flow and conserve water.

Pinpointing the Cause

Before you start repairing, take a moment to figure out what’s actually causing the problem. A running toilet usually comes down to one of three things: a worn flapper, an overflow issue, or a faulty fill valve. Here’s how to check each one.

Worn or Faulty Flapper

The flapper is the rubber seal at the bottom of the tank. It lifts when you flush so water can move into the bowl. With age, it can wear out or warp, which prevents a tight seal and lets water keep flowing.

How to Check:

• Take the lid off the toilet tank.
• Flush and observe the flapper as it rises and drops.
• If it fails to seal tightly when it settles, that’s probably why water keeps running.

Problems with the Overflow Tube

The overflow tube keeps the tank from spilling over by sending extra water down into the bowl. When the water level is set too high, water will continuously drain into the overflow tube.

How to Check:

• Check the water level inside the tank.
• If it sits above the top of the overflow tube, lower the fill level.

Fill Valve Troubles

The fill valve regulates how much water enters the tank. When it malfunctions, the tank may overfill or fail to fill enough.

How to Check:

• Listen for hissing or other odd sounds.
• See whether the water stops rising at the right level.

Replacing the Flapper

When the flapper is the culprit, the repair is usually straightforward. Follow these steps to swap it out:

1. Turn off the Water Supply: Find the shutoff valve behind the toilet and turn it clockwise to cut the water flow.
2. Drain the Tank: Flush to empty most of the water, then use a sponge or towel to soak up what’s left at the bottom.
3. Remove the Old Flapper: Detach the flapper from the chain and unhook it from the pegs at the base of the overflow tube.
4. Install the New Flapper: Hook the new flapper onto the pegs and reconnect the chain, leaving a little slack when the flapper is closed.
5. Turn on the Water Supply: Turn the shutoff valve counterclockwise to bring the water back, then flush to test.

Setting the Correct Water Level

When the water level is too high, you’ll need to adjust the fill valve. Most toilets use one of two fill valve styles: float cup or float ball.

Float Cup Style

1. Locate the Adjustment Screw: Look for the screw on top of the fill valve.
2. Turn the Screw: Turn it clockwise to lower the water level or counterclockwise to raise it. Adjust in small increments and recheck.

Float Ball Style

1. Locate the Adjustment Clip: Find the clip on the metal rod that links the float ball to the fill valve.
2. Slide the Clip: Move it down to lower the water level or up to raise it. Make small changes and test with a flush.

Installing a New Fill Valve

If the fill valve is faulty, you may need to replace it. Here’s how to do it step by step:

1. Turn off the Water Supply: Close the valve behind the toilet.
2. Drain the Tank: Flush and use a sponge or towel to remove leftover water.
3. Remove the Old Fill Valve: Disconnect the supply line from the valve, unscrew the lock nut beneath the tank, and take out the old valve.
4. Install the New Fill Valve: Follow the manufacturer’s directions to fit the new valve, reconnect the supply line, and tighten the lock nut.
5. Turn on the Water Supply: Turn the water back on and set the level as needed.

A running toilet is a fix you can handle, and doing so can save a lot of water and money. Whether the trouble is the flapper, the water level, or the fill valve, the repairs are simple and require only basic tools and some patience. If you’d rather not tackle it yourself, contact Calix Plumbing for expert help and dependable service. Stop the waste and start saving today!