On this page, you'll find a helpful explanation on how a toilet works, with toilet plumbing diagrams and definitions of toilet parts. If you're trying to sort out why your toilet isn't operating ...

A moaning toilet is likely caused by a faulty fill valve, commonly known as a ballcock or float valve. Use this guide to replace it with a new one.

Your toilet is always there for you. Once you know how to fix the handle, the flush valve, and the fill valve, you'll be able to help in its time of need.

Is my fill valve or float to blame for a running toilet? The heart of your toilet’s functionality lies in the fill valve and the float.

All you need are simple tools and basic plumbing skills to get your toilet working. Fill valve kits are designed with DIY installers and handy people in mind.

The fill valve controls the amount of water that refills the tank, and it can wear out and need adjusting or replacing to keep your toilet flushing smoothly.

There are three likely culprits that can cause a toilet to run continuously — the float, flapper, or fill valve. Luckily, each is easy to replace.

Is my fill valve or float to blame for a running toilet? The heart of your toilet’s functionality lies in the fill valve and the float.