toilet with largest trapway

5 Top Toilets With Largest Trapway [ 2022 ]

Most toilets have 2 inches trapways which is sufficient to handle the average waste produced in your home. Unfortunately, sometimes standard-sized trapways aren’t enough; hence you will need to get a toilet with the largest trapway. 

A large trapway offers a wider path for wastes to pass, allowing them to drain more effortlessly into the sewer. With a large trapway, your toilet will not clog or leave some waste behind.

Some toilets with large trapways have outlets with a diameter of up to 3 inches. 

In this post, I will look at the best toilets with the largest trapway to help you choose a toilet that will suit you best. 

Review of Toilet With Largest Trapway

1. American Standard 2034.314.020, Champion 4



There are multiple to love the American Standard, like its amazing flushing performance and fantastic look. This toilet is a household favorite, excelling in cleaning bowls and handling bulk waste without clogging the drains. 

The Champion 4 stands out for several other reasons, especially its impeccable performance. For instance, the 2-3/20 cm trapway can handle up to 75% more waste compared to a standard toilet. 

Moreover, it has a 10 cm long flush valve with a piston action accelerator. This, together with the siphonic action bowl that has EverClean anti-bacterial glazing and jets, you will have a spotless bowl at all times. 

It’s a one-piece toilet designed to meet the Americans with Disabilities Act (ADA) standards. For example, Champion 4’s height reaches 17-19 inches and has a longer bowl giving you more legroom, and men can comfortably use it.

Champion 4 also comes in linen and bone with a Vitreous China coating. However, this toilet isn’t great in conserving water, with a water consumption rating of 1.6 GPF. 


  • High flushing power
  • ADA compliant
  • It’s compact
  • Comfortable
  • It has a soft close seat 
  • It’s available in multiple colors


  • It weighs more than 100 pounds 
  • It’s not great at conserving water
  • Noisy when replenishing water

2. TOTO MS854114SL#03 Ultramax ADA One Piece Toilet



Like the Champion 4, TOTO MS854114SL is also a one-piece toilet coated with Vitreous China. This toilet features a G-Max flushing system that delivers a commercial-grade, powerful, and quiet flushing performance. 

TOTO MS854114SL is designed with a glazed 2-1/8-inch trapway, and the flush valve is 3 inches wide. These features allow the toilet to increase the flow, draw the water quickly into the bowl, and flush forcefully.

Furthermore, the strong siphon jet from G-Max ensures all the waste drains down the sewer with a single flush. TOTO MS854114SL is also highly stable because it’s mounted on the floor, and its 17 inches in height meets the ADA requirement. 

Other impressive qualities include the molded bumper, an ergonomic, comfortable design, and a soft close seat. Moreover, it features a cleaning agent and chemicals-resistant high-gloss polyurethane.

 TOTO MS854114SL toilet is also WaterSense certified, thus ensuring proper water usage. However, the consumption isn’t the best since it has a 1.6 GPF rating, and it is also heavy, weighing 117 pounds.

This toilet is available in Sedona beige, bone, colonial white, and cotton. 


  • Compact
  • Durable
  • Quiet
  • Ergonomic, comfortable design
  • ADA compliant
  • It delivers a powerful flush
  • Stable 


  • It’s heavy
  • Water consumption is a bit high

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3. WOODBRIDGE T-0001, Dual Flush Elongated One Piece Toilet



This toilet features a unique D-shaped/rectangular shaped toilet and is equipped with non-clogging dual-flush capabilities. Woodbridge T-001 is a one-piece toilet that is elongated with a comfortable height. 

It has a concealed trapway and an entirely glazed siphon flush system that delivers a clog and leak-free, powerful, quiet flushing. In addition, this toilet’s skirted trapway gives it a sleek look, adding to your bathroom’s decor, and it makes cleaning the toilet easier. 

The concealed trapway also means there are no corners or bends, keeping the toilet area neat and dust-free. Moreover, there are no unpleasant plastic caps or big mounting holes. 

Woodbridge T-001 also features a soft closing high-end seat fitted with a durable stainless steel seat hinge. You can easily remove the seat to clean or tighten it.

Its water consumption rating is 1.6 or 1 GPF, depending on the flush button (full flush button or half flush button). 

The downsides include its weight of 119 pounds and limited color options. It’s also taller, making it hard for kids to reach to use it comfortably. 


  • Soft closing high-end seat
  • Powerful flushing
  • Easy to clean
  • A luxurious design featuring a ceramic finish 
  • It’s super quiet
  • Five-year guarantee


  • Bulky
  • It’s tall

4. TOTO MS604114CEFG#01 UltraMax II Toilet



What you get from the TOTO MS604114CEFG toilet is a rimless bowl, one-piece design, high water efficiency, and a powerful flush. It has an elongated bowl, making it highly comfortable.

TOTO MS604114CEFG uses Toto’s Tornado flush system, also called the double cyclone flushing system. This means it is not fitted with rim holes but uses two nozzles and a 3-inch flush valve, allowing water to enter the toilet bowl at a high force.

Due to the nozzles’ design, water forms two cyclones /vortexes as it goes into the bowl and creates a robust siphon for effective bowl washing and rinsing. Moreover, its engineering allows it to deliver a powerful flush with only 1.28 GPF.

In addition, it had a soft close seat design, so you don’t have to deal with the heavy toilet seat slam whenever someone uses the toilet. The seat also fits into the elongated bowl perfectly.

This toilet is WaterSense certified. It also meets the ADA standards since it is 17.25 inches tall, which falls between the 17-19 inches set by the act. 

However, it has a slanted back and an awkward handle. 


  • Powerful flush
  • Comfortable 
  • ADA compliant 
  • Soft-close seat
  • Available in multiple colors
  • Universal height


  • Awkward handle
  • Slanted back

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5. Swiss Madison Well Made Forever SM-1T254 St. Tropez One Piece Toilet



Swiss Madison isn’t as popular as Kohler, TOTO, and American Standard, but it manufactures some of the market’s most innovative and elegant toilets. Swiss Madison SM-1T254 is a quality toilet with 2.75 inches skirted trapway to deliver a powerful flush and clean it easily.

With Swiss Madison SM-1T254, you get an exquisite toilet featuring a sleek, smooth, modern design at an affordable price. While this toilet is tall, it’s pretty compact with a length of 26.5 inches, making it suitable for all bathrooms, regardless of size. 

Moreover, this toilet’s slimline tank looks taller than most but saves space in small bathrooms. It is also comfortable for adults because of its elongated bowl. 

Swiss Madison SM-1T254 is a dual-flush toilet, offering full flush and partial flush for flushing solid waste and liquid waste, respectively. Full flush consumes 1.28 GPF, while a partial flush uses 0.8 GPF, so it utilizes less water and is friendly to the environment. 

It is worth noting that this toilet is bulky, weighing about 110 pounds, so if you decide to install it yourself, get someone to help you avoid breaking it. 


  • WaterSense certified
  • Quick-release seat
  • Powerful flush
  • Soft-close seat
  • Comfort height


  • Complicated installation

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FAQ on Toilet With The Largest Trapway

1. What Is Toilet Trapway?

A toilet trapway, also called a toilet trap, is a curving channel found inside a toilet’s base. It directs waste to the drainpipe from the bowl.  

2. What Is The Best Trapway Size For A Toilet?

Most toilets typically have 1 3/4 – 2 inches trapways, but some go up to 3 inches. However, based on the ANSI standards, the least accepted size is 1 ½ inches.

Choose a size that suits your home, keeping in mind that toilets with the largest trapways are well-suited to handle more sizeable waste. In addition, they deliver powerful flushing.

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We hope this list helps you select the best toilet with the largest trapway with the features you want and one you can comfortably afford. Besides the size of the trapway, make sure you consider the other qualities. 

See also Why is Water Disappearing from Toilet Bowl

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