A running toilet wastes up to 200 gallons of water per day. In most cases the fix takes under 30 minutes and costs less than $15 in parts.
Step 1 — Lift the tank lid and observe
Remove the lid from the back tank. Watch for 30 seconds: is water spilling into the tall center pipe (overflow tube)? If yes, the float is set too high. If not, the flapper is likely leaking.
Step 2 — Test the flapper
Press down on the rubber flapper with your finger. If the running stops, the flapper is worn and needs replacement. A new flapper costs $5–$10 and snaps on in minutes.
Step 3 — Adjust or replace the fill valve
If water is spilling into the overflow tube, lower the float. On cylinder-style fill valves, turn the top adjustment counterclockwise until water sits 1 inch below the overflow tube. If the fill valve itself is worn, a replacement kit is $12–$20.
Step 4 — Check the flush chain
A tangled or too-short chain holds the flapper open. Disconnect, straighten, and re-clip leaving half an inch of slack.
Still running? Call a handyman
If the toilet keeps running after these steps, the fill valve or flush valve seat may need replacement. The Toolbox Pro handles toilet repairs starting at $85 — usually fixed in a single visit.
Frequently Asked Questions
How much does toilet repair cost?
Toilet repair at The Toolbox Pro starts at $85, covering diagnosis and repair of running water, leaks, clogs, and flapper replacement.
What is the most common cause of a running toilet?
A worn rubber flapper is the #1 cause. It stops sealing the tank opening, allowing water to trickle into the bowl continuously.
Can I fix a running toilet myself?
Yes. Flapper replacement requires no tools and takes under 10 minutes. Fill valve replacement is also DIY-friendly but takes 20–30 minutes.
How much water does a running toilet waste?
A running toilet can waste 200+ gallons per day — adding $30–$60 to your monthly water bill. Fixing it promptly is worth the effort.
When should I replace the toilet rather than repair it?
Repair if the toilet is under 20 years old and structurally sound. Replace if the tank or bowl is cracked, or if it's an early 1990s low-flow model with chronic clog problems.
