Dual Flush Toilets: How They Save Water and Money-:Complete Guide

Are you looking for a way to save money and conserve water? Look no further than the dual flush toilet.

This guide will help you understand how this wondrous piece of technology works, how to install it and all the benefits it provides. You’ll be able to take advantage of this amazing eco-friendly tool in no time!

Dual flush toilets provide users with two different flushing options which enable them to choose a water-saving flush for liquid waste and a more powerful flush for solid waste. This water saving technology has made dual flush toilets incredibly popular around the world, with many countries in Europe and elsewhere offering subsidies and rebates to encourage people to switch to dual flush toilets.

Dual flush toilets help reduce water use and save money on the user’s monthly utility bills.

In this article, we will look at how dual flush toilets work, their advantages, and why they are an effective choice for anyone looking to save money on their monthly bills while also reducing their carbon footprint. We’ll also provide information on subsidies and rebates available in various countries to make it easier for you to make the switch.

Definition of Dual Flush Toilets

Dual flush toilets are a type of toilet with two different types of flushing mechanism, providing the user with a choice between whichever type of flush they need. This type of toilet has become increasingly popular due to its ability to save up to 70% more water than conventional toilets. It contains two separate buttons – one button uses a smaller amount of water for a ‘light’ flush and the other option provides the user with larger amounts of water for ‘heavy’ flushes.

This technology is becoming increasingly viable in terms of sustainability, as it is seen as an effective solution which reduces domestic water use and lowers bills. In addition to this, dual flush toilets can also help reduce pollution levels due to the fact that less water needs to be used to cleanse wastewater.

Why Dual Flush Toilets are important

Dual flush toilets provide significant economic and environmental benefits to both individual households and the world at large. By reducing the amount of water used during a typical toilet flush, dual flush toilets save money by lowering monthly utility bills and help conserve natural resources through reduced water use.

The traditional toilet produces a single, large flush that sends around 3.5-7 gallons of water tumbling into the bowl with each flush. Dual-flush toilets, in comparison, offer two separate flushing options—a full flushing for solid wastes and a smaller “half-flush” for liquid waste—permitting families to make more efficient use of their water supply. A full flush uses from 1 to 1.6 gallons at most per flushing cycle; the half-flush utilizes 0.9 to 1 gallon of water per flushing cycle.

In addition to conserving up to 4 gallons of water or more with each manual operation, dual-flush toilets also provide greater flexibility for draining similar wastes separately or together when needed or desired—allowing modern homeowners an opportunity to further reduce their overall toilet energy usage as well as conserve on precious drinking water supplies around the world. Furthermore, dual-flush toilets may be engineered so they can quickly readjust themselves when different pressures become available due to changing detaining surfaces within the local lines during various times throughout years; thus allowing possible reductions in unnecessary flooding issues caused by unexpected overflows from faulty toilet seal/valve/leaf arrangement designs.

How Dual Flush Toilets Work

Dual flush toilets are a special type of toilet with two flushing buttons, one for solid waste and one for liquid waste. When the full flush button is pushed, a larger volume of water is released into the bowl, which makes it more effective at flushing away solid waste. The half flush works with less water on lighter waste and is designed to be more economical by conserving water use.

When these two buttons are activated in tandem, the individual results combine to create a powerful dual flush cycle that offers both cleaning strength and efficient conservation. In addition to functioning as regular toilets, dual flush toilets also feature refill tubes located inside the cistern that automatically fill up after each flush. This helps create continuous performance with minimal effort and reduces future costs.

The cistern tank of most dual flush toilets contains two buttons linked to two separate flushing mechanisms: one for powerful full-flush operation – often 3 liters or more –and another for light or partial-flush operation – typically 1 or 2 liters. This allows users to select between either full or partial flushes depending on the purpose of their visit without wasting excess amounts of water attributable to an overabundance of complete flushes. By using different amounts of water per cycle, users can save thousands of gallons over time with some estimates claiming a family’s annual savings in excess of $60 per year when switching from traditional single flush toilets to high efficiency dual-flush toilets!

Explanation of the two flushing options

Dual flush toilets use two separate buttons or a lever handle to operate the flushing mechanism. By offering both a full and reduced water flush, you can choose the water volume that is best suited for the waste you are flushing down the toilet.

For light loads, a reduced flush can be made which uses far less water than what is required in typical toilet systems. This not only saves on H2O but cuts down water bills as well.

The reduced flush typically uses 1-2 gallons of water and is best used to dispose of liquid or paper waste. The full flush generally uses 3-7 gallons of water and should be used when flushing solids such as dog waste, diapers, or feminine hygiene products.

Each type of flush helps to ensure efficient and proper treatment of wastewater while at the same time conserving valuable resources and money on large utility bills each month.

Mechanism behind the flushing system

Dual flush toilets use two buttons or two handles to operate two different flushing volumes. This system allows for separate purposes for each flush; one for liquid waste and one for solid waste. This way, the user can reduce water consumption to a fraction of what traditional toilets require. The lower volume flush is used most of the time, thereby reducing water expenditure significantly and thus reducing utility bills as well as conserving water sources.

The key to understanding dual flush systems is to know the difference in how they utilize air pressure compared to older systems that rely on siphoning. With conventional toilets, after the flush lever is released, a siphon descends and creates a vacuum allowing stored water in the cistern to flow through the flushing mechanism and into the bowl before it refills with fresh water again. Dual-flush system works differently in that when pushing down on either handle it forces air into the tank which then pressurizes it causing a volume of stored water to be forced through special dual outlets into the bowl while simultaneously opening an inlet valve from outside which refills the tank with fresh water. By pressing down on either button harder or longer depending on your preference you can increase pressure thereby increasing volume of fresh/stored water released into bowl and thus creating a more power full flush meant for solid waste disposal.

Water and Money Savings

One of the primary benefits of having a dual flush toilet is its ability to save both water and money. According to the U.S. Environmental Protection Agency, dual-flush toilets can reduce total water consumption by up to 45 percent for an average household when compared to standard models. That means in a year, you could save more than 12,000 gallons of water from entering our lake and rivers. On top of that, modern low-flow toilets can help reduce your annual utility bill by as much as $110 a year—an amount that adds up over time.

To better demonstrate how dual flush toilets save money and conserve resources, let’s take a look at the case study below:

Case Study: Suppose you own an older single-flush toilet that uses 3.5 gallons per flush (gpf), compared to the 0.8 gpf used by low-flush models like a modern dual flush toilet. With two people using the bathroom five times per day over the course of one year (365 days), your total annual water consumption would be 31,752 gallons (2 people x 5 flushes x 365 days x 3.5 gpf). This means with traditional single-flush models you would be expending an estimated 31,752 gallons annually on your toilet alone!

However if you were to switch over to dual flush models with their 0.8/1.6 gpf combination settings, you would cut that number down considerably—to 15 276 gallons per person annually (2 people x 5 flushes x 365 days x 1 gpf). You’ll notice this is nearly half of what was used previously! This translates into big gains for both your wallet and for environmental sustainability over time—all without making any changes in your lifestyle or usage habits whatsoever!

Comparison of water usage between traditional and Dual Flush Toilets

Traditional toilets require the same amount of water each time they are flushed regardless of what is flushed down them. This often results in a much higher amount of water used per flush than necessary.

Dual Flush Toilets offer an economical and efficient alternative to traditional toilet flushing methods that can help to reduce household water use and save money on utility bills.

Dual Flush toilets give users the option to choose how much water they use with each flush depending on the type of waste being disposed: a full flush button uses more water for solid waste, while a half-flush button uses less for liquid waste. Using either option, Dual Flush Toilets typically use up to 70 percent less overall water than traditional toilets at 4.8 gallons per flush compared to the 13 gallons required by their predecessors.

Additionally, Dual Flush toilets are designed with a larger trap way which helps with sucking out liquids and solid waste, reducing clogging and maintenance costs as well as energy costs from frequent flushing attempts due to clogs or slow draining.

Calculation of potential money savings

By using a dual flush toilet, you can save water and money. This is because a dual flush toilet allows users to select either a full or partial flush, depending on the amount of waste being flushed. Selection of the right type of flush means that only the necessary amount of water is used each time you go to the bathroom.

When calculating how much money can be saved by using a dual flush toilet, you need to take into consideration several factors including water costs in your area and how much water is used with each type of flush.

One way to calculate potential money savings is to compare two different scenarios: one where an older single-flush toilet is used, and another where a more modern dual-flush model has been installed. If a single-flush toilet consumes an average 6 liters per full flush and 3 liters for partial flushing purposes, over one month this could add up to 972 liters (6 liters x 28 full flushes + 12 liters x 5 partial flushes). In contrast, if switching to a dual-flush system that uses 4 liters for full flushes and 2 for partial ones over the same period only 780 liters would have been consumed in total (4 liters x 28 full flushes + 10 liters x 5 partial flushes). This means almost 200 litres saved over one month simply by changing from an old single-flush model’s 6 litres per full flush range down to 4 litres with more modern dual-flush options.

To determine how much money could be saved in your specific area, it’s important to factor in factors such as annual water rates and overall daily usage costs associated with your existing facilities. By combining this information with data regarding your current consumption levels before switching over to a dual-flush system it should be possible estimate potential cost savings accurately after installation has taken place.

Choosing the Best Dual Flush Toilet

When it comes time to choose the best dual flush toilet for your bathroom, there are a few things to consider. Before making a decision, it is important to look at the toilet’s size and shape as well as the type of flush system it uses. Additionally, you should consider factors like water usage ratings and installation ease.

Size and Shape – Dual flush toilets come in a variety of sizes ranging from 14 inches to 16 inches. Some toilets have elongated bowls, while others have round bowls. The type of bowl you choose will depend on what style fits best in your bathroom and how much space you have available.

Flush System – Dual flush toilets employ two different types of flushing mechanisms: gravity-fed or pressure-assisted systems. Gravity-fed systems rely on gravity and water pressure so they are generally quieter than pressure-assisted models; however, they can be less powerful at removing waste from the bowl. Pressure-assisted models use air pressure to create more power for wastewater removal.

Water Usage Ratings – The Environmental Protection Agency (EPA) has established guidelines for water efficiency in residential products — commonly referred to as WaterSense labels — that aim to reduce water use while still delivering performance benefits like comfort, convenience and reliability. You should always look for WaterSense certification when shopping for dual flush toilets as these designs typically use 20% less water than standard models which helps with long-term savings on your water bills.

Installation Ease – Installing a dual flush toilet can be quite complex given all the different components involved in hooking up drains, sewage lines and secure mounting underneath the tank; thus, opting for an easier set up such as an expandable or one-piece design is usually recommended if it is your first time tackling this job yourself.

Factors to consider when choosing a Dual Flush Toilet

Dual flush toilets offer homeowners the opportunity to save money and protect the environment through conserving water. But with a wide range of options in both design and technology, it is essential to consider several factors when selecting a dual flush toilet.

The primary decision should be based on which type of toilet best meets your needs. Each version is designed to utilize a different system and they fall into two main categories: gravity fed or pressure- assisted systems. Gravity fed models allow air and water pressure to move the waste down the pipes, while pressure-assisted systems use compressed air forced within the bowl to push solid wastes out of the tank more quickly with greater force using less water.

In addition, you will want to evaluate price, size, flushing performance ratings from different industry standards, installation guidelines, compatibility with existing components (such as connection types), technology features (which can include an integrated motion detector) and warranty information from manufacturers. Finally, consider your choice of style—check out today’s bright color options for toilets— in order to match décor or fetch a bold accent for your bathroom.

Comparison of popular brands and models

When considering a dual flush toilet, it’s important to compare the popular brands and models on the market to find one that fits your needs and budget. The ability to save water and money without sacrificing style or performance is invaluable when looking for a new toilet. To help you make the best choice, here is a comparison of some of the most popular dual flush toilets on the market today.

American Standard H2Option Siphonic Dual Flush Toilet: This high-efficiency toilet features an ultra-low 1.6-gallon full flush and 0.8-gallon half flush, as well as a powerful siphonic action that provides outstanding flushing performance in a compact design. Its EverClean surface is easy to clean, making it ideal for busy households with heavy use. It also comes with an EverDrain overflow valve for added peace of mind during power outages or plumbing problems.

TOTO Entrada Dual Flush Toilet: This two-piece efficient design from TOTO combines PowerWash rim jets that provide a powerful swirl action with Tornado Flush technology for efficient flushing performance in one low profile bowl design. The 1G and 0.8 GPF settings automatically adjust according to your selection, so you can conserve up to twenty percent water usage when compared with traditional 3G toilets. It also features SanaGloss glaze for reduced bacteria growth and SuperSmooth glaze for easier cleaning between uses. Additionally, this toilet includes CEFIONTECT glaze – helping keep your bowl cleaner longer by preventing particles from sticking below the waterline between flush cycles and cleaning sessions give it its impressive following amongst homeowners who prioritize both efficiency and style in their toilet selection process.

Kohler Cimarron Comfort Height Elongated Dual Flush Toilet: This easy-to- install model from Kohler offers WaterSense certification along with 1G/0.8GPF Dual Flush Technology that helps save up to 20% compared with typical 3G tank systems while still providing powerful flushing results every time you use it due to its AquaPiston flushing technology which helps displace cleansers faster than ever before possible. Additionally, this model comes in an ADA compliant comfort height elongated offering additional comfort for those elderly homeowners or menopausal women or adults suffering from knee pain all thanks due mostly due its 17″ rim height sitting above most other modes currently available on the market – just about anyone can enjoy its enhanced performance thanks coupled with modern stye look!


Dual flush toilets can save a significant amount of water and money over time. Whether you choose to install a new one or convert an existing toilet, taking the time to make the switch can help conserve our water resources, save money on utility bills, and even reduce plumbing repairs in the future.

Installing one yourself is relatively easy, but if you’re not comfortable tackling it yourself, consider hiring a licensed plumber to do so. With the right care and maintenance, your dual flush toilet should last for years to come.


Does a dual flush toilet save money?

 Yes, a dual flush toilet can save money on water bills in the long run.

How much water do you save with a dual flush toilet? 

A dual flush toilet can save up to 68% more water than a traditional single flush toilet, which can result in savings of up to 15,000 gallons of water per year.

How do you save money on a toilet flush? 

To save money on toilet flushes, you can install a low-flow toilet or a dual flush toilet, repair any leaks, and only flush when necessary.

Does a dual flush save water? 

Yes, a dual flush toilet can save water by allowing users to choose between a low-flow flush for liquid waste or a higher flow flush for solid waste.

Which is better dual flush or single flush? 

A dual flush toilet is generally considered better than a single flush toilet because it allows users to choose the amount of water needed for each flush, resulting in greater water savings.

What is the best toilet for saving water? 

Low-flow toilets and dual flush toilets are the best options for saving water, as they use significantly less water than traditional single flush toilets.

Does flushing the toilet less save money?

 Yes, flushing the toilet less can save money on water bills, but it is important to balance water conservation with good hygiene practices.

What is the disadvantage of dual flush toilet? 

The main disadvantage of a dual flush toilet is that it can be more expensive to install than a traditional single flush toilet.

What is the advantage of dual flush toilet? 

The main advantage of a dual flush toilet is that it can significantly reduce water usage, resulting in long-term cost savings and environmental benefits.

How much water is used per flush? 

The amount of water used per flush varies depending on the type of toilet, but traditional single flush toilets typically use 1.6 gallons of water per flush, while low-flow and dual flush toilets can use as little as 0.8 gallons per flush.

See more-

Leave a Comment