Locate the float: It might be a float ball on a rod or a cup sliding along the fill valve. Test the water level: Flush the toilet and watch when the flow of water stops.

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.

Install the flow restrictor For some models of fill valve (including this one), there are a handful of flow restrictors that come with it in several colors: black, brown, clear, gray, blue, etc.

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 your toilet taking forever to refill? It might be time to replace the fill valve. This DIY guide walks you through the entire process with no plumbing experience needed.

2. Replace the Fill Valve If adjusting the float doesn’t do the trick, you may have a leaking fill valve might be beyond saving. Replacing it is straightforward but has a few basic steps.