How To Flush A Dual Flush Toilet – Step By Step Guide

How to flush a dual flush toilet can be a question that brings up fear and panic, especially if you’re at home, on vacation, or it’s your first time using one. Even DIYers can feel the pressure of getting their feet under them after their initial installation. But don’t worry! I have some helpful tips to remember for how to flush a dual flush toilet and more.

Dual flush toilets are one of the most common types of toilets in use today. They allow users to flush both the waste and the water at the same time, which can save a lot of time and energy. However, dual flush toilets can become clogged up over time. 

You need to take a few steps to flush your dual flush toilet:

  1. Turn on the water supply.
  2. Ensure the lever is in the “flush” position.
  3. Pull down on the handle to fill the toilet with water.
  4. Release the handle and wait for the water to fill the bowl before pushing the lever back to “flush.

But if you still don’t get it, then worry not because we are here to guide you in-depth on how you can flush dual flush toilets like a pro. So before going to the actual topic, here are some essential things you should know well, which help you understand the process quickly.

What Is a Dual Flush Toilet?

Dual-flush toilets allow you to choose between two different flush volumes, depending on what kind of waste you need to dispose of.

The first flush volume is usually larger and designed for liquid waste, while the second is smaller for solid waste. This means that using a dual-flush toilet can save water without sacrificing comfort or convenience.

How Does a Dual Flush Toilet Work?

Dual flush toilets are designed to use a smaller amount of water for liquid waste and a larger amount for solid waste. This helps you save water, but it also allows you to be more conscious about how much water you use.

The way it works is that a lever or button on the toilet is used to release water into the bowl. There are two buttons, one that releases a small amount of water and another that releases a larger amount. 

The smaller button releases just enough fluid to clear urine and other liquid waste, while the larger button releases enough fluid to clear out solid waste. When you do this, you will only have to use one-third as much water as traditional toilets do.

How To Flush A Dual Flush Toilet – Step By Step Guide

Flushing a dual flush toilet is easy, but knowing how to do it properly is essential. Here’s a step-by-step guide:

1. Turn on the water and let it run for 15 seconds. This will help to prevent clogs in the toilet.

2. Put your hands on either side of the bowl, with your palms facing down against the ceramic surface. This will help you avoid getting splashed when you flush the toilet.

3. Press firmly on the handle or plunger until all your waste has gone into the sewer system. Don’t worry if it takes more than one press of the handle—the plunger is designed to work smoothly over several presses without causing any damage to your toilet or clogging up its pipes with excess water.

4. When you’re done flushing, turn off your water by closing off its supply valve at its source (usually under your sink). You can also turn off any automatic shutoff valves inside your bathroom walls and anywhere else where water may leak into other rooms from behind them).

For more pro tricks read our blogs:

How To Flush Toilet Without Handle

How To Flush a Toilet From The Inside

Dual Flush Toilets In The Home: How To Install One

Installing a dual flush toilet can be a simple project to make your home more eco-friendly.

You’ll need to purchase a new dual flush toilet, which is available in most hardware stores. Once you’ve purchased the toilet, you can install it by removing the old toilet seat and lid. Set them aside for now.

Next, remove the wax ring around your old toilet bowl and set it aside. Then, using a screwdriver, remove the old bolts holding your toilet to its base and set them aside with the other items. Now remove your old toilet bowl from its base and set it aside.

Now you’re ready to install your new dual flush toilet! Slip it into place over the existing plumbing lines and secure it with the bolts that came with your new toilet. You may need some plumber’s putty or other sealant where this meets with your flooring material if there is any gap between these two surfaces.

If so, use a plumber’s putty or silicone caulk to fill this gap up before securing everything together tightly enough so that no water can escape through cracks or gaps between these parts.

For more information read our blog how to install a dual flush toilet 

Are Dual Flush Toilets More Environmentally Friendly Than Traditional Toilets?

The short answer is: yes, if dual flush toilets are installed correctly and if they are used correctly.

Dual flush toilets are more environmentally friendly than traditional toilets because they use much less water per flush. This saves water, which means less wastewater for treatment plants to process—ultimately saving municipalities and taxpayers money.

However, it’s important to note that dual flush toilets can only be considered “green” if appropriately installed and used correctly. If either of these two things is not done correctly, then the environmental benefits of using a dual flush toilet will be lost.

Problems With Using Dual Flush Toilets

Dual flush toilets are great for saving water and reducing environmental impact, but they have some problems.

Water Keeps Running After Flushing

One of the most common issues is that water keeps running after you flush. This can be a massive problem if you’re trying to conserve water—you might end up with a full bathtub when you only want to fill up the toilet. This can also mean you’re wasting precious water that could go toward other uses, like watering your garden or washing dishes.

The Need for Constant Cleaning

Another issue is that dual flush toilets require constant cleaning. These toilets have two flushing options: a “flush for liquids” and a “flush for solids.” The liquids button will send all of your waste down the drain with just one push of a button.

While the solids button will send it down in two stages: first into a holding tank and then into the main drain. Over time, this means more work for homeowners who don’t want to deal with cleaning out their tanks every few weeks or months!

Increased Clog Risk

If you use too little water while flushing liquids, they can clog your toilet bowl. This problem is exacerbated by the fact that many dual flush toilets do not allow users to adjust the amount of water used in each flush, which means that if you use less than recommended for a fluid flush (say, because you have small children who are prone to throwing food down the drain), you risk clogging your toilet bowl.

Higher Toilet Repair Costs

If you always have a tight budget, then a dual flush toilet is not for you because it can be costly to fix any time you have a problem with your toilet, especially if it involves plumbing issues.

Dual flush toilets are no exception: their unique design means that when things go wrong, they tend to require more extensive repairs than most other models would need (such as replacing parts rather than just tightening screws).

The Button Dilemma

Dual flush toilets are a great alternative to the standard toilet, but they can be tricky to use. But one of the most significant problems users encounter is accidentally pressing the wrong button and starting over. 

This happens because the buttons on dual flush toilets are often placed very close together, so it’s easy for your hand to slip off one and land right on the other. This can be incredibly frustrating if you’re in a hurry or just trying to get out of the bathroom quickly!

Malfunctioning of The Flush Mechanism

The other problem with dual flush toilets is that they sometimes malfunction, leading to flooding in your bathroom. This is especially problematic if you have children in your home because they may not be able to turn off the water once they start it flowing. 

If you have young children in your home, consider using a different type of toilet until they are old enough to understand how dual flush toilets work and how to turn off the water when necessary.

How To Fix Common Problems With Your Dual Flush Toilet

When you experience a problem with your toilet, you might be tempted to flush the entire thing down the drain. But before you do that, what are some essential troubleshooting tips and techniques that can help fix common problems? Here we are going to share some pro tips.

Check The Water Supply Valve Before You Do Anything Else

Your first step before trying to fix the problem yourself should be checking the water supply valve. It’s usually located under your toilet and a lever that you can lift up to turn on the water. 

The location of this valve varies depending on which toilet you have, but if you have a dual flush model from Kohler or Toto (two popular brands), it might be on either side of your tank.

If The Water Doesn’t Fill Up, Your Toilet Might Have An Airlock

If your toilet won’t fill up, one of the first things to check is whether or not the fill tube is blocked. The fill tube connects your water supply to the tank and can be quickly cleared if it’s not submerged in water. If your toilet isn’t filling up, ensure that all other toilets on your property are functioning correctly before taking action. 

To determine if you have an airlock, submerge an empty bucket under the siphon break (the small opening at the bottom of the tank). If this works, then your problem has been resolved; otherwise, call a plumber immediately as you may have a clog somewhere else in your system.

Your Flush Valve Might Be Blocked, Or Your Flapper Might Be Broken

If your toilet keeps running, there are several possible causes. A clogged flush valve or sewer drain pipe is one of the most common.

You can check whether this is the case by removing the tank lid and checking for debris in the tank. If you spot anything that shouldn’t be there (hair, paper towels, etc.), remove it before proceeding with your repair.

If no debris is present, but water continues to run from your toilet after each flush, and no amount of plunging will stop it, then it’s likely that your flapper needs replacing.

The flapper may also be responsible for excessive splashing when using your dual-flush toilet; if so, check for cracks or tears in its rubber seal before replacing it with a new one.

The Fill Tube Needs To Submerge When You Turn On The Water. If It Doesn’t, You’ll Need To Replace It

If your fill tube is not submerged, it won’t fill appropriately and could cause other problems. The good news is that this is an easy fix. You can buy a new fill tube at any hardware store and install it yourself in just a few minutes.

If you decide to replace the fill tube, get the right one for your toilet! Some toilets use a different type of tubing than others; a universal replacement will work for most toilets but might not fit perfectly on some models.

Check For Leaks By Filling The Tank To Its Maximum Capacity And Ensuring The Toilet Is Still Full After a Few Minutes

You can check for leaks by filling the tank to its maximum capacity and ensuring the toilet is still full after a few minutes. If it is, you’ve got a leak somewhere in your system.

If your toilet isn’t still whole after a few moments, we can rule out this possibility of leaking from the tank itself.


In conclusion, it is essential to flush the toilet regularly to avoid clogging and other problems. Dual-flush toilets are easy to use, but following the manufacturer’s instructions is necessary.

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