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Anatomy of a toilet

Have you ever wondered how a toilet actually works? It's actually pretty simple, check it out!

Toilet with location of all replacement parts

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Step 1

The fill valve brings water into the tank after the toilet is flushed and stays on until the tank refills. Any time water exits the tank (such as when a flapper is leaking), the fill valve will turn on in order to maintain the water level.

Step 2

The flapper sits on the flush valve and is connected to the tank lever by a chain. When the toilet is flushed, the flapper lifts up off the flush valve seat and allows the water to exit the tank.

Step 3

When the toilet is flushed, water flows from the tank into the bowl through the flush valve.

Step 4

The purpose of the tank to bowl gasket is to provide a leak free seal between the toilet tank and bowl.

Step 5

An alternative to the traditional wax ring solution, the WaxFREE Seal Kit is a cleaner alternative to toilet installation.

How does a Toilet Work?

294,154 May 20, 2014

How does a toilet fill valve work?

238 August 7, 2017

How does a toilet flapper work?

56 August 7, 2017

Korky® Flush Valve Demonstration

75,844 May 20, 2014
How does a Toilet Work?
How does a toilet fill valve work?
How does a toilet flapper work?
Korky® Flush Valve Demonstration

Product solutions

Korky 4010 Complete Kit
Part Number: 
4010
  • Fix your leaking, noisy, or running toilet in 1 trip
  • The complete kit includes a fill valve, flush valve, flapper, and tank-to-bowl hardware
99-4 Beehive Max Toilet Plunger
Part Number: 
99-4
  • Guaranteed to fit all toilet bowl shapes and sizes
  • As seen in This Old House® Best New Home Products
  • Easy plunge T-handle design