A toilet that keeps running or refills on its own is wasting water all day. The good news: the cause is usually one of a few inexpensive parts.
Take the lid off and look
Worn or warped flapper
The rubber flapper at the bottom of the tank seals the flush valve. When it hardens or warps, water leaks into the bowl and the tank keeps refilling. Test with a few drops of food coloring in the tank; color in the bowl without flushing means the flapper is leaking.
Chain problems
A chain that's too short holds the flapper open; too long and it can get caught underneath. Leave a little slack.
Water level too high
If water is spilling into the overflow tube, lower the float on the fill valve so the water stops about an inch below the top of the tube.
Faulty fill valve
A fill valve that hisses, won't shut off or refills slowly may need cleaning or replacement.
Cracked overflow tube or flush valve
Less common, but it requires replacing the flush valve, which usually means removing the tank.
When to call a plumber
- Parts are corroded or the tank bolts are rusted
- Water is leaking onto the floor
- The toilet rocks or you smell sewer gas at the base
- You've replaced parts and it still runs
If a toilet ever starts overflowing, turn the shut-off valve behind it clockwise to stop the water, then call for help.
Need help?
Our 24/7 emergency plumbing team serves Davie and all of Broward County. Call (954) 870-5492.