How to Stop a Running Toilet

A Running Toilet Wastes 200+ Gallons Per Day

That constant running sound isn't just annoying - it's costing you money. Here's how to diagnose and often fix it yourself:

Step 1: Remove the Tank Lid

Lift the lid off the back of the toilet and set it aside carefully (they break easily).

Step 2: Check the Flapper

The flapper is the rubber piece at the bottom of the tank that covers the drain hole.

• Push down on the flapper with your hand. If the running stops, the flapper isn't sealing properly.
• Check for warping or mineral buildup - an old flapper may need replacement.
• Flappers cost $5-10 at any hardware store and take 5 minutes to replace.

Step 3: Check the Fill Valve

The fill valve is the tall mechanism on the left side of the tank.

• The water level should be about 1 inch below the top of the overflow tube.
• If water is flowing into the overflow tube, the fill valve needs adjustment.
• Most fill valves have an adjustment screw on top - turn it to lower the water level.

Step 4: Check the Float

• If you have a ball float (the ball on a rod), bend the rod down slightly to lower the water level.
• If you have a cup float (slides up and down the fill valve), adjust the clip on the side.

When to Call a Plumber

• If you've replaced the flapper and it's still running
• If the fill valve is leaking
• If the toilet is rocking or leaking at the base
• If you hear water running in the wall (could be a supply line issue)