Expert advice

The experts at Home Depot can offer advice on how to repair some of the most common problems with toilets, such as these instructions for replacing a flush valve. For help with other troubleshooting and repairs, visit

Q: Can I fix a small toilet leak myself?

A: A leaky toilet can waste about 200 gallons of water every day, so fixing a broken toilet can help save water and money.

Installing a new flush valve

The flush valve, located in the middle of the toilet, includes the overflow tube and the hole where water enters the bowl when the toilet is flushed — the hole that’s covered by the rubber tank ball or flapper. This assembly includes a large rubber washer that over time can become worn or stiff, causing leaks. Also, the hole in the assembly itself can become corroded, preventing a good seal and allowing water to drip into the bowl. If any of these conditions exist in your toilet, it’s time to replace the flush valve assembly.

Tools needed: Screwdrivers, adjustable wrenches, spud wrench, slip joint pliers

1. Turn off the water at the shut-off valve, then disconnect the ballcock and remove the toilet tank. Gently set the tank upside down, and remove the old flush valve by unscrewing the spud nut with a spud wrench or a pair of slip joint pliers.

2. Slide the cone washer onto the tailpiece of the new flush valve. The beveled side of the cone washer should point toward the end of the tailpiece. Insert the flush valve into the tank opening so that the overflow pipe faces the ballcock.

3. Screw the spud nut into the tailpiece of the flush valve, and tighten with a spud wrench or a pair of slip joint pliers. Place the soft spud washer over the tailpiece, and reinstall the toilet tank. Turn on the water, and check for leaks.

Rick Carpenter is store manager of the Sports Arena Home Depot store. Send him questions at


