When you are in the market for a new toilet you must also ensure that you are getting the right components for it. One such key component for installing a toilet at home is the trapway. The trapway ensures that your investment lasts for years to come.
However, not all trapways are created equal. Some are larger than others. Also, a larger trapway delivers superior performance than the smaller ones. So, people may ask, “What toilet has the largest trapway? Also, what benefit does a bigger toilet trapway bring for homes and apartments?
In this blog post, we’ll explore the top toilets with the largest trapways on the market today. You will also learn about their utilities and installation process. So, get ready to flush away your worries and find the perfect toilet for your needs!
What Is A Toilet Trapway and What Does It Do?

The toilet trapway is an essential part of any toilet system, but many people may not know what it is. They are also unaware about its functions. In simple terms, the toilet trapway is a channel that runs from the bottom of the bowl to the drainpipe in your bathroom floor.
This channel serves two main purposes:
- First, it allows water and waste to flow out of the bowl and into your home’s plumbing system.
- Second, it creates a seal between the bowl and sewer line. The sealing will prevent sewer gasses from entering your home.
In addition to these basic functions, the size and shape of the trapway significantly impacts the flushing system of your toilet. When you frequently experience clogs or slow drainage with your current toilet, you can upgrade the toilet trapway to a larger trapway. It could be just what you need for more efficient flushing.
However, you may also rarely notice that some high-efficiency toilets feature smaller trapways than traditional models. Although these toilets are designed to use less water per flush, they may require more frequent maintenance if not properly cared for. So, a larger trapway is still a better choice for homes to enjoy less maintenance without any further hassle.
What Toilet Has The Largest Trapway?
The trapway is a crucial component of any toilet and it plays a major role in preventing clogging. It also ensures efficient waste removal.
The largest trapway for the toilet is usually 3-3/8-inches or 4-inches. The lager trapway offers better waste management to prevent clogs. You will find the larger trapways in public toilets, commercial space and industrial rears. However, there are generally two common options: 2-inch and 3-inch traps.
2-inch trap:
It is the standard size for most residential and commercial toilets. The 2-inch trap refers to the diameter of the waste pipe. The 2-inch size is suitable for normal usage and is widely available in the market. It is sufficient for handling typical waste flows and is commonly used in most households.
3-inch trap:
Some toilets have a larger trap size of 3 inches in diameter along with the large toilet base. It is less common but found in commercial or industrial settings, public restrooms, or high-traffic areas. In short, you will find it where there may be a higher volume of waste.
The larger trap size ensures improved flow. So, it can handle larger amounts of waste, reducing the likelihood of clogs or blockages. However, note that 3-inch trap toilets will most likely require specific plumbing configurations. So, it may not be suitable for all residential applications due to their larger size.
The Top Choices For Large Trapways For Toilet
When it comes to choosing a toilet, one of the most important factors to consider is the size of its trapway. The trapway is the pipe that connects the bowl to the sewer line and carries waste away from your home. A larger trapway allows for more efficient flushing and reduces clogs.
Here are seven toilets with some of the largest trapways on the market:
- Gerber Ultra Flush – The toilet boasts an impressive 2-3/8 inch fully glazed trapway, making it one of the largest available.
- Toto Drake II – With a 2-1/8-inch computer-designed fully glazed trapway, this model provides powerful flushes while reducing water usage.
- Kohler Highline Classic – Its 2-1/8 inch fully glazed large diameter trapway ensures powerful and effective waste removal.
- American Standard Champion-4 – It features a four-inch non-clog piston action accelerator flush valve. So, the model has one of the widest outlets in its class.
- Mansfield Plumbing QuantumOne – This toilet features a three-inch oversized flush valve. It combines with a wide-open two-and-seven-eighths inch glazed passageway for maximum performance
- Niagara Stealth – The unique design combines air pressure at dual levels into water during each flush that results in high-powered cleaning ability without sacrificing efficiency
- WoodBridge T-0019 Dual Flush Toilet– With siphon flushing system, this model has an extra-large 3” trap way that prevents clogging even after several usages
All these models have large diameters which make them suitable for commercial properties or households who prefer long-term durability.
Gerber Ultra Flush
Gerber Ultra Flush is a powerful flushing toilet. The trapway and toilet have been designed to offer top-of-the-line performance. The model features an elongated bowl design, which adds more comfort and convenience during use.
One of the most notable aspects of Gerber Ultra Flush is its large trapway size. With a diameter of 2-3/8 inches, this toilet boasts one of the largest trapways on the market today. As such, it can easily flush away larger waste materials without requiring multiple flushes.
Additionally, Gerber Ultra Flush comes with a high-quality valve that provides efficient water flow while maintaining low noise levels. The valve also helps prevent clogs and blockages by ensuring consistent water pressure during each flush.
If you’re looking for a reliable and efficient flushing toilet that won’t disappoint in terms of performance and comfort, then Gerber Ultra Flush is definitely worth considering. Its large trapway size alone makes it stand out from other models in its price range!
Toto Drake II
Toto Drake II is a highly popular toilet model that has a large trapway. Also, it includes several features to enhance its performance. The toilet offers maximum comfort while using less water, making it an ideal choice for those looking for eco-friendly options.
We were impressed with Toto Drake II, thanks to its powerful flushing system. The double cyclone flush technology ensures that every bit of waste is eliminated effectively without leaving any residue behind. This not only keeps your toilet clean but also helps you save on water bills.
Another great feature of this toilet model is its sleek and elegant design. So, it complements any bathroom decor perfectly. It also comes in different colors, allowing you to choose one that matches your style and preferences.
The Toto Drake II boasts a comfortable height. Hence, it is easy for people of all ages to use without straining their knees or backs. Additionally, the SoftClose seat prevents slamming noises and ensures quiet closing after use.
The Toto Drake II stands out as an excellent option for those seeking both comfort and efficiency when it comes to toilets.
Kohler Highline Classic
The Kohler Highline Classic is a toilet model that has a lot to offer in terms of trapway size and overall performance. With its wider than average 2-3/8 inches trapway, blockages are less likely to occur, making it an ideal choice for households with multiple users or high traffic bathrooms.
This toilet features Kohler’s patented AquaPiston flushing system which delivers powerful and efficient flushes every time. The bowl shape not only adds comfort but also helps reduce clogs by minimizing the contact between waste and the sides of the bowl.
Apart from its functional features, the Kohler Highline Classic comes in a sleek design. The modern design makes it a great addition to any bathroom decor. It’s available in various colors so you can choose one that fits your preference.
If you’re looking for a reliable toilet with excellent trapway size and optimal flushing power, then you should consider getting the Kohler Highline Classic.
American Standard Champion-4
The American Standard Champion-4 is undoubtedly a force to be reckoned with when it comes to toilet trapways. This highly-rated toilet offers an impressive 2⅜ inch fully-glazed trapway, making it one of the largest on the market.
You will love its ability to flush away up to 70% more mass than other toilets, thanks in part to its large trapway. The design also incorporates a powerful accelerator flush valve that delivers unrivaled flushing performance and ensures everything disappears down into the drain.
But that’s not all – this toilet boasts an EverClean surface, which helps prevent dirt and grime from sticking around in your bowl. Plus, it has a comfortable elongated seat that adds extra value for those who want comfort while using their bathroom facilities.
Frequently Asked Questions
- What is the standard size for a toilet trapway?
The standard size for a toilet trapway is 2 inches. However, some toilets have larger trapways to help prevent clogs.
- Do all toilets have visible trapways?
No, not all toilets have visible trapways. Some models have concealed or skirted designs that hide the trapway from view.
- Can you replace a toilet’s trapway?
No, it’s not possible to replace a toilet’s existing trapway without replacing the entire unit. Of course, larger traps can prevent clogs and improve flushing power. However, replacing them won’t necessarily make your toilet more water-efficient.
- How do I know if my current toilet has a large enough trapway?
If you experience frequent clogs or slow drains with your current toilet, it may be worth investigating whether upgrading to a model with a larger flush valve and/or wider outlet pipe could help improve performance.
Conclusion
The larger the toilet trapway is, the better its flushing capacity will be. So, you will enjoy better flushing and lesser clogs with the largest trapway. Now that you know what toilet has the largest trapway with a sleek design, it’s time to buy one for your home or apartment.
Always remember that choosing the right toilet depends on your preference and needs. Do you prioritize water efficiency or power flushing capabilities, there is sure to be a toilet on this list that meets your requirements.
We hope that this guide helps you understand what a trapway is and why it’s important in selecting a toilet. With so many options available, finding the perfect fit for your bathroom can seem daunting. But armed with knowledge about the largest trapways on offer today, you’ll quickly find the right trapway size and mount it in your toilet.
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