Top 5 Best Dual Flush Toilets – (Reviews & Guide 2022 )

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Last Updated on June 9, 2022 by acechapman

flush toiletBest Dual Flush ToiletsIn this guide, we’ve built up a list with the most comprehensive reviews of best dual flush toilets among the market.

This type of toilets are becoming increasingly popular for their ability to save water on most flush.

This not only reduces the amount of water used, saving resources, it also lowers water bills.

The EPA has a certification scheme for toilets that use less than 80% of the federally regulated 1.6 gallons per flush but, at the same time have the capacity to clear a specified volume of solid waste on every flush.

This test is carried out using miso paste to have a constant test load. All the toilets below, with the exception of the Saniflo, are EPA Water Sense certified.

The Saniflo Sanicompact is a different type of toilet that uses a macerating and pump to remove waste. It still has a dual flush and a very low water consumption.

For more toilet reviews, read here!

Quick Comparison

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TOP 5 Dual Flush Toilet Reviews

1 – American Standard H2Option Toilet

The H2Option has a dual flush system using 1.6 GPF for the full flush and 1.0 GPF for the partial flush. The flush is operated by two chrome plated push buttons on the top of the tank. The flushing action is enhanced by American Standard’s H2Option Siphonic flushing system which is a high efficiency pressurized flushing action. Even though the full flush uses more than the general Water Sense specification of 1.28 GPF, as this is a dual flush toilet the testing is different. The test is based on the average of two partial flushes and one full flush. The H2Optmeets this specification and therefore Water Sense certified. This toilet is not ADA compliant. The toilet, which is 100% flush tested before leaving the factory, carries a 5-year limited warranty. Our full review on the H2Option toilet can be seen here.


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2 – Toto Washlet with Integrated Toilet Model

This model is a compact, one-piece, skirted toilet and bidet combined. It is one of the very few dual flush toilets that meets all the requirements of ADA compliance. Although other dual flush toilets meet the height and bowl specifications for ADA compliance, they do not meet the levered flush requirement. It overcomes this by having an automated flushing mechanism. It is a technology packed toilet in both the construction and electronically controlled features. The Washlet is Water Sense certified.

The toilet has Toto’s 3D Tornado flush system that uses a series of nozzles to increase the flushing capability of the toilet using minimal water. In combination with the ultra-smooth ceramic glaze, this helps keep the toilet cleaner for longer and minimizes the need for manual cleaning.

>> See here for best toilet brushes & here for best repair kits: <<

There is an automatic opening and closing of the lid, which then triggers the automatic flush. The seat is heated and the washing feature of the bidet (click here!) can be adjusted for both direction and temperature. These functions along with the variable warm air drying can be adjusted via the wireless remote control pad. Read the full review on the Toto Washlet with Integrated Toilet!

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3 – KOHLER Wellworth Dual Flush Toilet

This dual flush toilet has a rounded front that requires less floor space than the elongated toilets, therefore suitable for smaller bathrooms and powder rooms.

The fact that the toilet is a little smaller does not reduce the efficiency of the toilet. WellWorth has a Class 5 flush system that can remove a large quantity of waste in just one flush and still meet the EPA Water Sense specifications for low water consumption.

Kohler’s class 5 toilets are renown for the amount of waste that they can flush away in a single flush, even with only 1.28 gallons of water. The dual flush system delivers a full flush of 1.28 gallons or a partial flush of 1.1 gallons. This video, from Kohler, explains the way that the flushing system works.See full page Wellworth Toilet Review!


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4 – TOTO Aquia Dual Flush Toilet 

The TOTO Aquia is a close coupled two piece design. On the top of the tank are two chrome buttons that are used to trigger either of the two flushes. The toilet with a seat (which must be purchased separately) is what Toto refer to as ‘universal height’. This means that the shape and height of the seat meet the requirements of the ADA specifications, but due to having a flush triggered by buttons rather than a lever, the toilet is not fully compliant.

>> Read here for tall toilets! <<

With a choice of either a full flush of 1.6 gallons or a partial flush of 0.9 gallons, the Toto Aquia meets the stringent requirements for the EPA Water Sense certification for dual flush toilet. This means that over a series of tests the water consumption must be no more than 80% of the federally mandated 1.6 GPF, i.e. no more than 1.28 GPF. This toilet is well within that requirement with an average of 1.1 GPF. Read full  TOTO Aquia Toilet review.


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5 – Saniflo Sanicompact Toilet

The Saniflo 023 SANICOMPACT is quite different to most standard toilets in that it uses macerating and a pump to remove waste, rather than flushing directly into the drainage system. This makes the Sanicompact 48 an ideal solution to fitting a toilet in areas where a standard flush toilet is impractical. A waste pipe from a sink can also be hooked up to the toilet making it an ideal solution to building a half bath in places where a standard toilet would be impractical. The pump on the toilet can pump up to 9 feet in height and 100 feet horizontally, all through a 1” pipe.

As mentioned above, the Sanicompact 48 does not use a conventional flushing system. Instead, once the flush button is pressed, the toilet fills itself with a set volume of water, then this, together with the waste, is drawn through macerating blades and pumped out through the 1” waste pipe. The flushing system is explained in this video from Saniflo. Here is the full review on the Saniflo Sanicompact.

>> Check out other compact toilets here:<<

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Flushing Mechanisms  

Flushing-Mechanisms2To achieve the highly effective flushes that are achieved with smaller volumes of water, all the lower water use toilets have an enhanced flushing system. Although the newer system varies from manufacturer to manufacturer, rather than the flap valve that was used on older toilets, the water conserving toilets use a siphon system that boosts the power of the flush.

In our review of the best Dual Flush toilets, we have selected the best flushing toilet from the 100s available and endeavored to explain what all the features mean to you as the consumer of the product.

Best Dual Flush Toilet Comparison Chart

PRODUCTPRICEWater ConsumptionProduct Dimensions
American Standard H2Option Toilet
$1.6 GPF27.8 x 15 x 29.5 inches
Toto Washlet with Integrated Toilet Model
$$$1.28 GPF28.5 x 11.8 x 25.2 inches
KOHLER Wellworth Dual Flush Toilet
$1.6 GPF28.5 x 18 x 29.2 inches
TOTO Aquia Dual Flush Toilet
$0.9 GPF27.5 x 14.2 x 31.2 inches
Saniflo Sanicompact Toilet
$$1.6 GPF18.2 x 14.5 x 15.8 inches

We also recommend considering to have a proper water filter or a reverse osmosis system for clean and safe water usage.


Comments (3)

  1. Jim Rush August 15, 2017
  2. Skydoesminecraft October 5, 2018
    • ToiletMeIn November 29, 2018

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