Diagnose a Running Toilet in 3 Easy Steps

By Aaron Stickley, About.com Guide

Check the overflow tube. If you can see water going into the overflow then you know that the fill valve is not shutting off all the way and needs to be replaced.

• For step by step instructions look at Replacing A Toilet Fill Valve.

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• Start by Removing the Tank Lid
• Step 1: Check the Overflow Valve
• Step 2: Check the Flapper Chain
• Step 3: Check the Flapper Seal
• What's the Cause?

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