How to Fix a Running Toilet

Why This Matters

A running toilet wastes 200-1,000 gallons daily. Most fixes are simple DIY tasks under $20.

What You Should Do

1. Check the flapper — Most common cause; replace for $5-10.

2. Adjust the float — If water overflows, lower the float.

3. Check the chain — Too much slack prevents sealing.

4. Inspect fill valve — If it doesn't shut off, replace for $10-20.

5. Test with food coloring — Dye in tank; if it appears in bowl, flapper is leaking.

When to Call a Professional

If replacing flapper and adjusting float don't fix it, or if water leaks from the base, call a plumber. A leak at the base means a failed wax ring.

The Bottom Line

Staying ahead of plumbing maintenance saves money and prevents emergencies. Search our directory for a trusted plumbing professional.