All Guides

Learn every major part of a toilet, from the flapper and fill valve to the wax ring and flange. See what each part does, which ones wear out first, what replacements cost, how to match the right part by model number, and when a whole new toilet makes more sense. Includes a short section on bedside commode parts.

There are several types of toilet flush systems in use today — gravity, pressure-assisted, dual flush, siphonic, washdown, and tankless — and knowing which is which helps you troubleshoot, buy the right parts, or pick a better toilet during a remodel. This guide explains how each one actually works, decodes confusing brand marketing names like Class 5 and Tornado Flush, and breaks down which type fits different real-world situations.