Most Water Efficient Toilet Types and Features Compared

The quest for a water-efficient toilet is a top priority for many of us, and for good reason - every gallon counts. Dual-flush toilets are a popular choice, using a single flush for liquid waste and a second, more powerful flush for solid waste.

Some dual-flush toilets can save up to 4.8 gallons of water per day. The WaterSense label is a great way to identify water-efficient toilets that meet EPA standards.

Low-flow toilets are another option, using significantly less water than traditional toilets. They typically use 1.6 gallons per flush or less.

The EPA estimates that installing low-flow toilets can save up to 13,000 gallons of water per year.

A different take: Water Pressure Low in Toilet

Low-flow toilets are a great option for saving water, using only 1.28 gallons per flush compared to 1.6 gallons per flush for standard toilets.

You can expect to save around $10.76 per year by replacing your old toilet with a low-flow one, which can pay for itself in less than 7 years.

Curious to learn more? Check out: Low Water Level in Toilet

Some low-flow toilets may have more frequent problems with clogs, but advances in hydronic power are starting to make up for this issue.

The estimated cost for a low-flow toilet in Princeton, NJ is between $423 and $495.54, including installation.

Here's a breakdown of the estimated costs:

Waterless sanitation is a game-changer for water efficiency. Waterless toilets have lower environmental impacts than water efficient toilets and wastewater recycling systems.

The most common type of waterless toilet is the composting toilet (CT), which can conserve water resources and keep effluent and pollutants out of waterways and the general environment. If used and maintained correctly, waterless toilets don't smell.

Waterless toilets can produce fertilizer if sufficient time is allowed and correct treatment conditions have been maintained. This makes them a great option for environmentally fragile or water-scarce areas.

Composting toilets take place through a complex biochemical interaction of factors such as temperature, pH, desiccation, and digestion by invertebrates, all taking place over an extended time period. The container is permanently fitted under the toilet seat, and never has to be fully emptied as the compost can be gradually removed when it reaches the end-product chamber.

The Laveo Dry Flush is a great example of a waterless and chemical-free portable lightweight toilet. It bags waste and stores it in a cartridge, eliminating the need for wastewater/black water pumping/dumping or adding of chemicals.

Here are some key features of waterless toilets:

High-efficiency toilets are a great way to save water and reduce your environmental impact. They use significantly less water than traditional toilets, with some models using as little as 1.28 gallons per flush.

To determine if your current toilet is high-efficiency, check the label for the gallons per flush (GPF) rating or look for a manufacturer's stamp inside the tank. If your toilet is older, it may use 3.5 or more gallons per flush, which is a significant amount of water.

Low-flow toilets are another option, using only 1.6 gallons per flush and costing around $10.76 per year to operate compared to the average $21.27 per year for an old toilet.

A toilet fill cycle diverter can also help you save water, reducing the amount of water sent to the bowl and increasing the amount sent to the tank. These devices can be found on Amazon for around $5.29.

Before choosing a new toilet, consider the WaterSense label, which indicates that the toilet is 20% more water-efficient than standard toilets and has passed rigorous performance testing. A new WaterSense toilet could save a family of four over $300 per year on their water and sewer bill.

Here's a comparison of toilet costs and water usage:

Waterless/Dry Sanitation Toilets are another option, using no water at all and producing fertilizer if used and maintained correctly. These toilets are often used in RVs and environmentally fragile areas, and can save money on water bills.

When choosing a new toilet, consider the pros and cons of each option, including the cost, water usage, and environmental impact. By choosing a high-efficiency toilet, you can make a significant difference in reducing your water consumption and helping to create a greener earth.

American Standard's EverClean surface treatment is a game-changer for keeping the bowl cleaner for a longer period of time.

Their Dual Flush toilet is a great option, with a water usage of 1.28 GPF for the full flush and 0.92 GPF for the half flush.

The fully glazed trapway helps prevent clogs, making it a reliable choice for performance and efficiency.

Related reading: Vibrating Water Pipes When I Flush the Toilet

Dual Flush toilets are a type of toilet that offers a significant reduction in water consumption compared to standard toilets. They use a dual flush system, which allows you to choose between a full flush and a half flush, using only 0.8 gallons of water for liquid waste and 1.6 gallons for solid waste.

Studies show that a dual flush system can reduce up to 67% of water consumption in comparison to a conventional toilet. This is especially beneficial in areas where water conservation is a priority, such as in Australia, where all new toilets are required to be dual flush toilets.

The estimated cost for a Dual Flush Toilet in Princeton, NJ, ranges from $513 to $585.54, including material prices and installation costs. However, some states offer rebate programs to help offset the cost of upgrading to a high-efficiency toilet.

Dual flush toilets are considered high-efficiency, which means they can help reduce your water bill over time. This is especially true if you have a rebate program in place to help subsidize the cost of upgrading your toilet.

However, dual flush toilets often require more cleaning and are more difficult to clean than standard single flush models. This is because they retain less water in the bowl, which can result in an increase in dirtiness.

Here's a comparison of the water consumption of standard and dual flush toilets:

If you're considering installing a dual flush toilet, it's essential to ensure that your plumbing system is compatible with the new toilet. This is especially true for older homes, which may have developed sags, dips, and other problems that prevent a dual flush toilet from working.

Pressure Assist toilets can be pricey, and the extra machinery means a bigger risk of parts breaking or needing replacement.

They often require far less water per flush than non-pressure-assist models, which is a big plus for water conservation.

A smaller water demand means a smaller tank, making them ideal for small spaces.

Pressure Assist toilets tend to come with a noisier flush, so if you're a light sleeper, this might be a consideration.

Using a toilet with a low-flow flushing system is a simple yet effective water-saving technique. This can save up to 1.3 gallons of water per flush.

Dual-flush toilets are another option, allowing users to choose between a full or partial flush depending on the waste type. This can reduce water usage by up to 50% compared to traditional toilets.

Some toilets also feature advanced technologies like pressure-assisted flushing, which uses less water to achieve the same cleaning power as traditional toilets.

The WaterSense label is a great indicator that a toilet is water-efficient, using 1.28 gallons per flush (gpf) or less and meeting independently verified performance standards.

If you're looking for the most efficient toilets available, look for MaP PREMIUM ratings, which have met high performance standards and use 1.1 gpf or less.

Replacing an old toilet with a MaP PREMIUM toilet may even make you eligible for a rebate.

Discover more: Map of Water Pipes

Checking for leaks is a crucial step in water conservation. Leaks are often silent and can be easily overlooked, but they can waste a significant amount of water.

The most common reason for water use increases is toilet leaks. You might hear running water, hissing, or trickling sounds coming from the toilet, but many times leaks can be silent.

To check your toilet for leaks, you can simply listen for unusual sounds. If you don't hear anything, you can also check the toilet's water level and look for signs of moisture around the base.

According to the rates on July 1, 2025, an inefficient faucet can use up to 5 gallons of water per minute, which translates to 75 gallons per day and a cost of $796.03 per year.

Intriguing read: How Many Gallons of Water Will a Running Toilet Use

Low-flow toilets are often misunderstood, but the facts are clear: they do save a significant amount of water. Replacing old, inefficient toilets with new water-efficient models can decrease indoor water usage by 20 percent to 60 percent.

Installing a low-flow toilet in your home can save nearly 13,000 gallons of water per year. That's a lot of water! If all inefficient toilets in the United States were replaced, we'd save 360 billion gallons of water annually, equivalent to Niagara Falls' flow over the course of 9 days.

Expand your knowledge: Water Flowing through Pipes

Cloud services are often misunderstood as being too expensive. A higher upfront cost is often associated with cloud services, but this isn't always the case.

You can find some cloud services in the same price range as traditional alternatives. However, investing in a higher-quality cloud service can pay off in the long run.

Some cloud services can pay for themselves in less than 7 years, even though they're more expensive initially. This is similar to how a low-flow toilet can pay for itself in less than 7 years through water savings.

For another approach, see: How Often Do You Water Peonies

Low-flow toilets have a reputation for poor performance, but this myth has been largely debunked. In fact, many modern low-flow toilets use only 1.28 gallons of water or less per flush.

Manufacturers have made significant improvements in low-flow toilet technology over the years. This is evident in the fact that some brands now offer toilets with 1.28 gallons per flush rates, making them just as effective as their high-water counterparts.

Maximum Performance (MaP) ratings provide insight into individual model performance. Research reviews and tests of possible models before making a purchase to avoid any surprises.

For good performance, choose a model with a 350+ grams MaP rating. This ensures that your low-flow toilet will flush as well as your current toilet.

If you're still unsure, consider the fact that some low-flow toilets have advanced to using even less water while maintaining excellent performance.

The Kohler Memoirs Stately Toilet is a great example of a water-efficient toilet. It boasts a 1.28 GPF rate, using 20 percent less water than standard 1.6 GPF toilets.

This model meets the EPA's WaterSense standards, making it a reliable choice for those looking to conserve water.

The Kohler Memoirs Stately Toilet is a stunning example of how green can be gorgeous. It boasts a 1.28 GPF rate, which is in line with the EPA's WaterSense standards.

This toilet uses 20 percent less water than standard 1.6 GPF toilets, making it a great choice for those looking to conserve water.

The Toto Vespin II 1G Two-Piece Toilet is a sleek low-flow toilet with a super low 1.0 GPF.

It features Toto's ultra-powerful "Tornado Flush" system, which is designed to provide a powerful and efficient flush.

The Toto Vespin II 1G also sports a special SanaGloss ceramic glaze to keep the bowl cleaner for longer.

This toilet is not the cheapest model on the market, but it's considered a premium, high-quality toilet.