How to Fix a Toilet Running Constantly
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Signs You Have This Problem
A toilet that won't stop running is one of the most annoying—and wasteful—problems in your home. The good news? It's usually an easy fix that takes less than an hour and costs just a few dollars. In this guide, we'll walk you through exactly what's causing that constant water flow and how to stop it for good.
Water continuously trickling into the bowl
Water leaking from the tank into the bowl
Your water bill jumped significantly
The fill valve won't shut off
Everything else about a running toilet
Tools and Parts You'll Need
Adjustable wrench
Flathead and Phillips screwdrivers
Bucket
Flashlight
Replacement flapper kit
Fill valve replacement kit
White vinegar
Total estimated cost: $25-75 depending on what needs replacing
Step-by-Step Fix
- 1
Turn off the water supply
Look behind or underneath your toilet for a small valve. Turn it clockwise until it stops. You should hear the water stop flowing into the tank. If you can't locate it, head to your basement or water meter and shut off the main supply valve.
- 2
Remove and inspect the tank lid
Carefully lift off the porcelain lid—these break easily—and set it on a soft surface like a towel.
Related problems
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