Open Now
4.8-Star Service
Find a Plumber
Near You

The team at Fixed Today Plumbing are 100% Covid-19 Compliant and Vaccinated.

Fixed Today Plumbing

What happens after you flush?

What happens when you flush your toilet? Fixed Today Plumbing explains how your toilet works, what happens when you flush and everything else you might find interesting about toilets.

You don’t notice how your toilet system works when using it. And seeing as a person uses their toilet on average between 4 and 10 times per day, It is one of the things in your property that you expect to work.


Your toilet system has many components and works to keep you and your household free from disease and a toxic environment.

If you can smell a foul odour or your toilet seems blocked, it is important to unclog your drain using various DIY methods or contacting your local plumber. Without a fully functioning toilet, your human waste and things like toilet paper will have nowhere to go. This is a breeding ground for bacteria that can cause illness. The toilet flush process works together with your sewer pipes and sewage pipes.

Need a Plumbing Service?

How does my toilet work?

The main parts of a toilet are,

  • Flush handle or button
  • Cistern (tank)
  • Bowel
  • Lid

The cistern has internal parts, such as,

  • Float ball
  • Float rod
  • Inlet valve
  • Inlet tube
  • Piston
  • Siphon
  • Flush handle or button

Your toilet system uses gravity and pressure. That is the main way that it gets its ’power’. When you press the flush button or handle, the connected piston is pulled up and allows a small amount of water through the siphon.

There are holes in the rim of the cistern which release water when you use the flush. And the pressure, along with gravity, sends the water and waste down the pipes and past an S Trap.

This goes down from the main drain to the sewer drain. The cistern empties and takes the float ball down, activating the float rod. This opens the piston and refills the cistern with water to the correct level.

Where does stuff go after you flush it?

Once you press the flush handle or button, the water and waste will swirl and begin to be pushed down the toilet opening. This travels down your sewer pipe.

Water from washing and cooking will also be collected and taken down the sewer pipes. These wastes are collectively known as sewage.

Waste from other properties is collected and travels through the sewerage pipes. The final destination is the sewage treatment plants. So ensure only apt materials like toilet paper goes down your toilet. 

What happens to raw sewage?

Water Treatment Plant Photo

After you flush the toilet, waste from your drains eventually gets taken to a wastewater treatment plant. This is important as this process involves cleaning the water and removing bacteria, harmful germs, and toxins. This is done with special chemicals and various techniques. If you notice sewage in your yard, block off the area and contact a professional plumber.

Items are also removed, such as toys, jewellery and other objects that get flushed down a drain. Once the water has been processed at the treatment plant and fully clean and after rigorous testing to ensure it is environmentally safe, it is released into the ocean or local river. Or even turned into recycled water!

We Also Have Some Related Articles

How To Unclog a Toilet Without a Plunger

How To Unclog a Toilet Without a Plunger

Unblocking a toilet without a plumber isn’t as hard as it sounds, Fixed Today Plumbing show you how to unblock a toilet without a plunger.

What Are Plumbing Vents and Why Do You Need Them?

What Are Plumbing Vents and Why Do You Need Them?

Do you need plumbing vents? Why are they used? Everything you need to know about plumbing vents and more. All you need from Fixed Today Plumbing.

Why Does My Toilet Keep Running And What Can I Do About It?

Why Does My Toilet Keep Running And What Can I Do About It?

Does your toilet keep running or trickling after you flush? We have created a guide to help you figure out why and how to stop it!

Why Is My New Tap Leaking?

Why Is My New Tap Leaking?

Wondering why your new tap is leaking or dripping? Our informative guide has all the answers to put your mind at ease and get to the bottom of your dripping tap.

Contact Us Need a Plumbing Service?

1800 349 338