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Buying Guide
Toilet Rim Jets vs Rimless Bowl Design
A detailed comparison of traditional rim-fed jets and modern rimless toilet bowls to help you choose the right flushing system for cleanliness, power, and maintenance.
Why Trust Best Flushing Toilets
- Flushing power and MaP flush-test scores
- Water efficiency (GPF and EPA WaterSense)
- Aggregated owner reviews
- Clog resistance and trapway design
- Brand reliability and warranty
Research updated June 2026.
Quick Answer
Rim jets (traditional rim-fed holes) are proven, powerful, and widely available with high MaP scores. Rimless bowls eliminate the rim ledge, making cleaning easier and reducing bacteria buildup, but some models may sacrifice a small amount of flush power. For most households, a high-quality rim-jet toilet like the TOTO Drake II offers the best balance of performance and value. If easy cleaning is your top priority, a rimless model like the TOTO Aquia IV or Woodbridge T-0019 is a strong choice.
What is the difference between rim jets and a rimless bowl design?
Rim jets are small holes along the underside of the toilet rim that release water during a flush, creating a swirling action to clean the bowl. A rimless bowl design removes the traditional rim ledge entirely, using a single or dual-nozzle system to direct water across the bowl surface, which reduces hidden crevices where bacteria and grime can accumulate.
The fundamental difference lies in how water is distributed. In a rim-jet toilet, water flows through a channel inside the rim and exits through multiple small jets. This creates a powerful, often noisy, flush that scrubs the bowl sides. In a rimless toilet, there is no internal channel; water is expelled from one or two large nozzles at the back or sides of the bowl, creating a directed, high-velocity sheet of water that washes the entire surface. Rimless designs are generally easier to clean because there is no rim ledge to trap debris, but they may rely more on the bowl's glaze quality and the precision of the nozzle to achieve complete coverage.
Editorial Take
From a mechanical standpoint, rim-jet systems have been refined for decades and are extremely reliable. Rimless designs are newer and often marketed for hygiene, but the actual flush performance depends heavily on the specific model. Always check MaP scores and owner reviews for real-world clog resistance, regardless of rim type.
Which design flushes better: rim jets or rimless?
In general, traditional rim-jet toilets have a slight edge in raw flushing power and clog resistance, especially in gravity-fed models with large trapways (2-1/8 inches or wider). Rimless toilets can still flush very well, but some budget models may struggle with solid waste if the nozzle placement or water volume is not optimized.
To compare performance, we look at MaP (Maximum Performance) scores, which measure the grams of solid waste a toilet can flush in a single test. High-performing rim-jet toilets like the TOTO Drake II (MaP 1000g) and American Standard Champion 4 (MaP 1000g) are proven workhorses. Rimless models such as the TOTO Aquia IV (MaP 1,000g) and Woodbridge T-0019 (MaP 1000g) also perform excellently, but some rimless toilets from lesser-known brands may score lower. The key factor is not the rim design itself, but the overall engineering of the flush valve, trapway, and bowl shape.
| Model | MaP Score | GPF | Flush Type | Trapway | Height | Best For |
|---|---|---|---|---|---|---|
| TOTO Drake II (CST454CEFG) | 1000g | 1.28 | Gravity (Rim Jets) | 2-1/8" | 16-1/8" | Overall Performance |
| American Standard Champion 4 | 1000g | 1.28 | Gravity (Rim Jets) | 2-3/8" | 16-1/2" | Clog Resistance |
| TOTO Aquia IV (CST454MF) | 800g | 1.28 | Gravity (Rimless) | 2-1/8" | 16-1/8" | Easy Cleaning |
| Woodbridge T-0019 | 1000g | 1.28 | Gravity (Rimless) | 2-1/8" | 16-1/2" | Modern Design |
Editorial Take
Our aggregated owner review analysis shows that rim-jet toilets from TOTO and American Standard have the lowest complaint rates for clogs. Rimless models from the same premium brands perform similarly, but budget rimless toilets often receive more complaints about incomplete flushes. Stick with established brands for either design.
Is a rimless toilet easier to clean than a rim-jet toilet?
Yes, rimless toilets are generally easier to clean because they lack the rim ledge where bacteria, limescale, and mold can hide. The open bowl surface allows you to wipe the entire interior in one motion, and there are no hard-to-reach jet holes to scrub.
With a traditional rim-jet toilet, the underside of the rim is a common area for grime buildup, especially in households with hard water. Over time, mineral deposits can clog the rim jets, reducing flush performance. Cleaning requires a specialized brush to reach under the rim. Rimless bowls eliminate this problem entirely. However, rimless toilets still have a small gap between the bowl and the seat hinge area, which can collect dust. Overall, the cleaning advantage of rimless is significant for those who prioritize hygiene and low maintenance.
Editorial Take
If you live in an area with hard water, a rimless toilet can save you hours of scrubbing over the life of the toilet. The TOTO Aquia IV and Woodbridge T-0019 both have high-gloss glazing that resists staining, making them excellent choices for low-maintenance bathrooms.
Which rim-jet and rimless toilets are the top picks?
1
TOTO Drake II (CST454CEFG)
Best overall rim-jet toilet with proven 1000g MaP performance and quiet flush.
Flush TypeGravity (Rim Jets)
GPF1.28
MaP1000g
Trapway2-1/8"
Height16-1/8"
- Exceptional flushing power
- Quiet operation (G-Max system)
- WaterSense certified
- Higher price point
- Standard rim design requires cleaning
The TOTO Drake II is the benchmark for gravity-fed toilets. Its 2-1/8 inch glazed trapway and G-Max flush engine deliver consistent, powerful flushes with minimal noise. Owner reviews consistently rate it highly for reliability and clog resistance. It is a rim-jet design, so regular cleaning under the rim is necessary, but the performance is unmatched.
For most households, this is the safest recommendation. It combines WaterSense efficiency with a MaP score that handles even the largest waste loads. The elongated bowl and Comfort Height add to user comfort.
Editorial Take
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The Drake II is the gold standard for a reason. If you want a toilet that just works, without gimmicks, this is it. The rim jets are well-designed and rarely clog.
Bottom Line: The best rim-jet toilet for most buyers, offering top-tier performance and reliability.
2
American Standard Champion 4
Best for clog resistance with a massive 2-3/8 inch trapway.
Flush TypeGravity (Rim Jets)
GPF1.28
MaP1000g
Trapway2-3/8"
Height16-1/2"
- Largest trapway in its class
- Powerful flush with less water
- Affordable price
- Louder flush than TOTO
- Bowl can be prone to streaking
The Champion 4 lives up to its name with a 2-3/8 inch trapway that is the widest among standard residential toilets. This makes it exceptionally resistant to clogs. It uses a rim-jet design with a 4-inch flush valve for a fast, powerful flush.
Some owners note that the bowl glaze could be better, as occasional streaking is reported. However, for raw clog-fighting power, it is a top contender. It is also one of the more affordable high-MaP toilets on the market.
Editorial Take
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If you have a household with heavy use or children who flush inappropriate items, the Champion 4 is your best defense. The trapway size is a genuine advantage.
Bottom Line: Unmatched clog resistance in a rim-jet design at a great value.
3
TOTO Aquia IV (CST454MF)
Best rimless option for hygiene and modern design.
Flush TypeGravity (Rimless)
GPF1.28
MaP800g
Trapway2-1/8"
Height16-1/8"
- Easy to clean rimless bowl
- Sleek, contemporary look
- TOTO quality and durability
- MaP 800g is lower than some rivals
- Higher price for rimless design
The Aquia IV is TOTO's rimless offering, featuring a Tornado Flush system that uses two nozzles to create a centrifugal washing action. The rimless bowl is a dream to clean, with no hidden crevices. It is WaterSense certified and operates quietly.
Its MaP score of 800g is still very good for residential use, but it is not the highest in this guide. Some users report that occasional double-flushing is needed for very large waste loads. However, for daily use, it performs admirably.
Editorial Take
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The Aquia IV is a premium rimless toilet that sacrifices a small amount of flush power for superior cleanliness. It is ideal for master bathrooms where aesthetics and hygiene are priorities.
Bottom Line: A top-tier rimless toilet with excellent cleaning ease and reliable performance.
4
Woodbridge T-0019
Best value rimless toilet with a perfect 1000g MaP score.
Flush TypeGravity (Rimless)
GPF1.28
MaP1000g
Trapway2-1/8"
Height16-1/2"
- Exceptional 1000g MaP in a rimless design
- Soft-close seat included
- Affordable for rimless category
- Brand less established than TOTO
- Some reports of glaze imperfections
The Woodbridge T-0019 is a standout because it achieves a 1000g MaP score while using a rimless bowl. This proves that rimless designs can match traditional rim-jet power. It features a dual-nozzle system and a fully glazed 2-1/8 inch trapway.
It comes with a soft-close seat and is priced competitively. Some owners have noted minor glaze inconsistencies, but overall reviews are very positive. It is a strong alternative to the more expensive TOTO Aquia IV.
Editorial Take
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The T-0019 is a rare find: a rimless toilet that does not compromise on flush power. It is an excellent choice for budget-conscious buyers who want the cleaning benefits of rimless.
Bottom Line: The best value rimless toilet, offering top-tier flush performance and easy cleaning.
5
Kohler Highline Classic (K-3999)
Reliable rim-jet toilet with a classic design and solid performance.
Flush TypeGravity (Rim Jets)
GPF1.28
MaP800g
Trapway2"
Height16-1/2"
- Classic, widely available design
- Quiet-Close seat option
- Good value
- MaP 800g is average
- 2" trapway is smaller than competitors
The Kohler Highline is a solid, no-frills rim-jet toilet. It uses Kohler's Class Five flush technology, which is effective but not as powerful as TOTO's G-Max. It is a reliable choice for standard households.
Its MaP score of 800g and 2-inch trapway mean it is not the best for heavy use. However, it is widely available and often on sale, making it a good budget option.
Editorial Take
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The Highline is a dependable workhorse, but it does not lead in any performance category. It is best for those who prioritize brand familiarity and price over maximum power.
Bottom Line: A decent rim-jet toilet for average use, but not the best for high-demand situations.
6
Gerber Viper (21-128)
Best budget rim-jet toilet with strong flushing performance.
Flush TypeGravity (Rim Jets)
GPF1.28
MaP1000g
Trapway2-1/8"
Height16-1/2"
- Very affordable
- 2-1/8" glazed trapway
- WaterSense certified
- Noisier flush
- Less refined finish than premium brands
The Gerber Viper is a hidden gem for budget buyers. It offers a 2-1/8 inch glazed trapway and a MaP score of 1000g at a very low price point. It is a rim-jet toilet that punches above its weight.
Owner reviews are generally positive, though some note the flush is louder than premium models. The build quality is good for the price, making it a smart choice for guest bathrooms or rental properties.
Editorial Take
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The Viper is the best budget rim-jet toilet we have found. It offers features usually found in toilets costing twice as much. A great value pick.
Bottom Line: An excellent budget rim-jet toilet that does not skimp on essential performance features.
7
Swiss Madison St. Tropez
Stylish rimless option with a modern skirted design.
Flush TypeGravity (Rimless)
GPF1.28
MaP800g
Trapway2-1/8"
Height16-1/2"
- Sleek, skirted design
- Rimless bowl for easy cleaning
- Soft-close seat included
- Some reports of flush inconsistency
- Brand has shorter track record
The Swiss Madison St. Tropez is a visually appealing rimless toilet with a fully skirted bowl that hides the trapway. It offers a modern look and the cleaning benefits of a rimless design.
Performance is solid with an 800g MaP score, though some owners have reported occasional incomplete flushes. It is a good option for those who prioritize aesthetics and are willing to accept slightly less proven reliability.
Editorial Take
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The St. Tropez is a stylish choice, but its performance is not as consistent as TOTO or Woodbridge rimless models. It is best for low-traffic bathrooms where design matters most.
Bottom Line: A beautiful rimless toilet with decent performance, ideal for style-focused bathrooms.
Frequently Asked Questions
What is a rim jet in a toilet?
A rim jet is a small hole along the underside of the toilet rim that releases water during a flush to clean the bowl surface.
What is a rimless toilet bowl?
A rimless toilet bowl has no traditional rim ledge. Water is expelled from one or two nozzles to wash the bowl, making cleaning easier.
Which is better: rim jets or rimless?
Rim jets generally offer more proven flushing power, while rimless bowls are easier to clean. The best choice depends on your priorities.
Do rimless toilets flush as well as rim-jet toilets?
Many rimless toilets from premium brands flush very well, but some budget models may have lower MaP scores. Check specific model ratings.
Are rimless toilets harder to install?
No, rimless toilets install the same way as standard toilets. The difference is only in the bowl and flush mechanism design.
Do rimless toilets save water?
Both rim-jet and rimless toilets can be WaterSense certified. Water savings depend on the GPF rating, not the rim design.
Which toilet is easier to clean: rim jets or rimless?
Rimless toilets are significantly easier to clean because there is no rim ledge for bacteria and grime to accumulate.
Can rim jets get clogged?
Yes, rim jets can become clogged with mineral deposits over time, especially in hard water areas, reducing flush performance.
Are rimless toilets more expensive?
Rimless toilets can be slightly more expensive due to the newer technology, but budget-friendly options like the Woodbridge T-0019 are available.
What is a MaP score?
MaP (Maximum Performance) score measures the grams of solid waste a toilet can flush in a single test. Higher scores mean better clog resistance.
What is the best rim-jet toilet?
The TOTO Drake II is widely considered the best rim-jet toilet for its 1000g MaP score, quiet operation, and reliability.
What is the best rimless toilet?
The Woodbridge T-0019 is a top choice for rimless toilets due to its 1000g MaP score and affordable price. The TOTO Aquia IV is also excellent.
Do rimless toilets smell?
No, rimless toilets do not inherently smell. Proper installation and regular cleaning prevent odors, just like with any toilet.
Which brand makes the best rimless toilet?
TOTO and Woodbridge are leading brands for rimless toilets, offering models with high MaP scores and easy-clean bowls.
Sources
- EPA WaterSense, epa.gov/watersense
- MaP flush testing, map-testing.com
- Manufacturer published specifications (TOTO, American Standard, Kohler, Woodbridge, Gerber, Swiss Madison)
- Aggregated owner reviews from major retailers
Our Verdict
For most households, a high-quality rim-jet toilet like the TOTO Drake II or American Standard Champion 4 offers the best combination of flushing power, reliability, and value. If easy cleaning and a modern aesthetic are your top priorities, a rimless toilet like the Woodbridge T-0019 provides excellent performance without the maintenance hassle. Choose based on your specific needs: raw power or effortless hygiene.
How we rank & our data sources
We do not run physical lab tests. Rankings are built from published, verifiable data and real owner feedback, never paid placement.
- MaP (Maximum Performance) flush scores
- EPA WaterSense certification & GPF ratings
- Manufacturer specifications (trapway size, flush-valve, rough-in)
- Verified owner reviews from Amazon, Home Depot & Lowe’s
Researched by Marcus Bell · Last updated August 14, 2026 · Our review method
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