Why is my toilet still running after replacing flapper?
Robert Miller
Published Mar 12, 2026
Why is my toilet still running after replacing flapper?
If you’ve tried replacing the toilet flapper but the toilet still runs, the flush valve seat is probably rough or pitted. You can replace the entire flush toilet flapper valve, but it’s a big job.
How do I stop my toilet from trickling water?
Flush the toilet and verify that the chain holding the flapper is long enough to allow it to seat into the valve when it falls. If not, unhook the chain and lengthen it. Replace the flapper if it seats fully but still leaks. Turn off the water supply and drain the tank.
Can a toilet fill valve be repaired?
Fixing a toilet fill valve (once referred to as a ballcock) is relatively easy to repair if you happen to have a common Fluidmaster brand valve. Often, repairing a fill valve is done by simply replacing the entire fill valve, but Fluidmaster fill valves can be repaired by just replacing a seal inside the unit.
Is a running toilet an emergency?
A toilet that keeps running after its last use may seem like a minor annoyance (as long as it’s not flooding). However, the amount of water a malfunctioning toilet wastes will quickly add up. Even though a running toilet may not seem like an emergency, you need to get the problem fixed as soon as you can.
Why does my toilet sound like water is running?
Running noises occur when water leaks out of the tank and into the bowl, and then the tank re-fills with water. The valve in the tank allows water to escape into the bowl. The flapper chain in the tank is too tight and prevents the valve from shutting all the way.
What causes a toilet to trickle?
Trickling Water into the Bowl Most likely the cause is due to a bad flapper that needs to be cleaned. Before cleaning, first, drain the tank and bowl. If cleaning does not fix the issue or you see that it is damaged, then you should probably have the flapper replaced.
How much does a plumber charge to replace a toilet fill valve?
Toilet Repair Price by Type of Replacement
| Part | Replacement Cost (Labor Included) |
|---|---|
| Fill Valve | $60 – $120 |
| Flapper | $60 – $120 |
| Shut-Off Valve | $60 – $120 |
| Seat | $60 – $150 |
Can toilet fill valve go bad?
Unfortunately, fill valves can wear out, so you need to be aware of when your toilet fill valve is in need of replacement. Symptoms of a Faulty Fill Valve: There are several signs that indicate that your fill valve is in need of replacement. The most common is a running toilet.