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Can you hear water running in your toilet tank? Do you have to jiggle the flush handle
to make it stop? Have you noticed rippling water in the bowl? These are signs that your
toilet is leaking water right down the drain.
The most common reason a toilet leaks is that the flapper valve is worn out or damaged.
A bad flapper valve can also cause a toilet to flush by itself, a condition known as "ghost
flushing."
A flapper valve is a pliable rubber seal that opens like a lid to allow water into the toilet
bowl when the toilet is flushed. The flapper valve then slowly lowers over the valve seat
to seal off water flow when the flush has completed.
A new flapper is soft and flexible but over time, hard water minerals and in-tank cleaning
products will damage the rubber causing it to lose its pliability. This prevents the
flapper from forming a tight seal over the valve seat.
To replace a flapper valve, first you need to shut-off your water supply valve behind
the toilet. Turn it clockwise.
Next, remove the lid from the tank...then flush the toilet to remove as much water as
possible from the tank.
Disconnect the lift chain from the flush lever.
The next step is to pull the flapper from the pivot arm mount pegs on the overflow tube.
Wipe off the seal on the valve seat to ensure a good seal.
Next, line-up your new flapper valve with the pegs on the overflow tube, positioning
the flapper over the drain.
Clip the chain to the flush lever, leaving some slack in the chain.
Then push down on the flush lever to make sure the flapper's range of motion is right.
You may have to adjust the chain a time or two to get it right.
It's time to turn-on the water supply again and let the toilet tank re-fill.
The flapper valve should form a tight seal that prevents water from escaping the tank
and draining into the bowl. Once you're satisfied the flapper is not leaking,
replace the tank lid and discard the old flapper valve.
If replacing the flapper doesn't stop the leak, the drain seat itself might be bad or
the top surface is corroded and isn't allowing the flapper valve to get a good seal.
Replacing the fill valve and other tank parts may also be necessary to stop a leak.
Remember, if you run into trouble, a Roto-Rooter plumber is only a click or call away.