A clear, spec-based comparison of Kohler's two best-selling gravity toilets, weighing published MaP flush-test scores, GPF water use, EPA WaterSense listings, flush-valve and trapway design and aggregated owner reviews, so you can decide whether the simple, durable Highline or the refined, better-flushing Cimarron belongs in your bathroom.
Research updated June 2026.
For most homes, the Kohler Cimarron is the better buy. Its AquaPiston canister valve and concealed-trapway design clear a stronger MaP flush load and clean the bowl more thoroughly than the Highline. Choose the Highline only when you want the simplest, lowest-cost, most repair-friendly Kohler toilet that still flushes reliably.
The Highline and the Cimarron are the two toilets most American buyers end up comparing when they decide to stay with Kohler. They sit next to each other in nearly every home-improvement store and online listing, they share the same gravity-flush layout, the same available comfort height and elongated bowl, and the same standard 12 inch rough-in. On the shelf they look almost interchangeable. The differences that actually decide which one suits your bathroom are hidden inside the tank and under the bowl: the flush valve, the trapway, the bowl wash, the water use and the price. Those differences point each toilet at a clearly different buyer.
This guide compares the Kohler Highline and Kohler Cimarron head to head using published manufacturer specifications, MaP (Maximum Performance) flush-test gram scores, EPA WaterSense listings, flush-valve and trapway dimensions, bowl-wash design and aggregated owner ratings across major retailers. The goal is to match each toilet to a real situation rather than crown one universal winner, because the right answer depends on whether you value the lowest price and easiest repairs or the strongest flush and cleanest bowl. For the broadest cross-brand ranking of flush power, the pillar guide to the best flushing toilets places both of these models against TOTO and American Standard. This page stays focused on the two Kohler options.
We do not test toilets in a lab. We compare manufacturer specifications, published MaP flush-test gram scores, EPA WaterSense listings, flush-valve and trapway dimensions, bowl height and shape, and aggregated owner ratings across major retailers. Where one model clearly suits a use case better, we say so plainly rather than declaring a single winner for every home.
A side-by-side look at the two toilets in their most common elongated, comfort-height, 1.28 GPF configurations. Higher MaP grams means more waste cleared per flush. The tinted cell shows which model tends to lead on that row. Both ship in round and elongated bowls and in 1.28 and 1.6 GPF versions, so confirm the exact SKU before you buy.
| Spec | Kohler Highline | Kohler Cimarron |
|---|---|---|
| MaP flush score (top variant) | 800 g | 1,000 g |
| GPF (water per flush) | 1.28 or 1.6 | 1.28 or 1.6 |
| Flush valve | 3 inch flapper | 3 inch AquaPiston canister |
| Trapway | 2 1/8 inch glazed | Concealed, fully glazed |
| Bowl wash | Standard rim jets | Canister 360-degree wash |
| WaterSense certified | Yes (1.28 GPF) | Yes (1.28 GPF) |
| Bowl shape options | Round or elongated | Round or elongated |
| Height options | Standard or Comfort Height | Standard or Comfort Height |
| Skirted look | Exposed trapway | Concealed trapway (cleaner) |
| Typical price tier | Lower | Higher |
| Repair / parts simplicity | Simple flapper, generic parts | Canister, Kohler-specific kit |
| Typical owner rating | 4.5 | 4.6 |
The table makes the central trade-off clear. The Cimarron wins where flush performance and bowl cleanliness matter, thanks to its AquaPiston canister valve, concealed glazed trapway and stronger MaP score. The Highline wins on price and on simplicity of repair, since its conventional flapper-style flush valve uses widely available generic parts. Both carry WaterSense certification in their 1.28 GPF versions, both come in the same heights and bowl shapes, and both share Kohler's reputation for durable vitreous china. So this is not a case of one good toilet and one bad toilet. It is a refined performer against a dependable, lower-cost workhorse.
The single biggest engineering difference between these two toilets is the flush valve. The Highline uses a conventional flapper-style 3 inch flush valve. When you push the handle, a chain lifts a rubber flapper and water drops from the tank into the bowl through one opening at the bottom. It is a proven, simple mechanism that has flushed millions of toilets for decades, and on the Highline it clears a normal household load without complaint. Its published MaP score in the common 1.28 GPF version lands around 800 grams, which is a solid, above-average result that means it passes a large solid-waste test in a single flush.
The Cimarron uses Kohler's AquaPiston canister flush valve instead. Rather than a flapper hinged on one side, the canister sits in the center of the tank and lifts straight up, opening a passage that lets water flow into the bowl from a full 360 degrees rather than one direction. That even, all-around release drives a stronger, more complete siphon, which is why the Cimarron's top configuration reaches a 1,000 gram MaP score, the highest the test reports. In practical terms the Cimarron has more force in reserve for the worst-case loads in a busy bathroom, while the Highline has a smaller but still adequate margin. If flush power is your top priority, that valve difference is the most important line in the table above.
A canister flush valve like the Cimarron's AquaPiston opens a wider passage than a flapper and releases water evenly around the bowl, which produces a more forceful flush from the same gallons. It also has fewer wear points than a flapper that seals on one edge, so it tends to hold a leak-free seal longer. This single component explains most of the Cimarron's flush-power and bowl-cleaning advantage over the Highline.
Clog resistance comes down to two things working together: how forcefully the flush starts the siphon, and how smoothly the trapway lets waste pass to the drain. The Cimarron has an edge on both. Its AquaPiston canister produces the stronger initial push, and its concealed trapway is fully glazed inside, meaning the internal channel is coated with the same slick vitreous china glaze as the bowl. A glazed trapway resists the streaking and partial blockages that build up slowly in a high-use bathroom. The concealed design also smooths the exterior of the toilet base, but the cleaning benefit there is about the outside of the bowl, not clog resistance.
The Highline uses a 2 1/8 inch glazed trapway, which is a respectable diameter and clears a normal load reliably. Owner reviews of the Highline rarely complain about clogging in typical homes. What the Highline lacks is the Cimarron's extra force margin for the genuinely heavy loads that a large family or a frequently used bathroom can produce. If your household has a history of clogs or simply puts a toilet through hard daily use, the Cimarron is the safer pick. If you have never had a clog problem, the Highline's trapway is perfectly capable. For a deeper look at trapway design, our comparison of skirted vs exposed trapway toilets explains how the concealed base on the Cimarron differs from the exposed trapway on the Highline.
Value is not the same as cheapest, and these two toilets split the question neatly. The Highline almost always sits at a lower price than the Cimarron, which makes it the smart choice when you are buying several toilets at once, fitting out a rental or secondary bathroom, or simply want a dependable Kohler at the lowest entry point. Because it uses a conventional flapper valve, repairs are cheap and easy: a generic flapper from any hardware store will fit, and you do not need a Kohler-specific kit. Over a long ownership period that parts simplicity is a real, if modest, saving.
The Cimarron costs more, but for a primary bathroom that you use many times a day, the upgrade buys things you notice constantly: a more forceful flush, a bowl that the 360-degree canister wash keeps cleaner with less scrubbing, and the smoother, skirted concealed-trapway look that is easier to wipe down around the base. Those are daily-quality-of-life improvements, not spec-sheet trivia. For the master bath or the most-used toilet in the house, the Cimarron's higher price usually earns its keep. For a powder room used twice a week, the Highline's lower price is the better-value call. Check the current price on Amazon for each, since height, shape and color change what you pay.
The way we frame this for a friend is simple: buy the Cimarron for the bathroom you live in and the Highline for the bathrooms you maintain. The Cimarron's canister flush and concealed glazed trapway are genuine, daily-felt upgrades for a primary toilet, and the better MaP score gives you clog-resistance peace of mind. The Highline is the toilet we recommend by the pair for rentals, basements and guest baths, where its lower price and dead-simple flapper repairs matter more than the last increment of flush force.
Cleaning splits into two parts: the inside of the bowl and the outside of the toilet. Inside, the Cimarron's canister flush releases water around the entire rim, so each flush rinses the full circumference of the bowl rather than concentrating the flow in one area. That more complete rinse reduces streaking between cleanings and means less frequent scrubbing. The Highline's standard rim jets clean the bowl adequately, but the wash is less even, so stubborn spots can need more attention over time. Neither toilet here uses a specialized anti-stick glaze the way TOTO's CeFiONtect coating does, so a bowl cleaner is still part of normal maintenance for both.
Outside, the Cimarron's concealed trapway gives it a smooth, skirted lower body with no exposed S-bend curves to dust and wipe around. The Highline has a traditional exposed trapway, the familiar contoured shape on the side of the base, which collects more dust and takes a little longer to wipe. For a bathroom where appearance and easy cleaning matter, the Cimarron's skirted look is a clear advantage. If you want the absolute easiest toilet to wipe down, a seamless one-piece is smoother still; our comparison of one piece vs two piece toilets covers that trade-off, since both the Highline and Cimarron in their common forms are two-piece designs.
Water use is one area where these two toilets are genuinely matched. Kohler sells both the Highline and the Cimarron in a 1.28 gallon-per-flush version that carries EPA WaterSense certification, meaning it meets the federal efficiency benchmark and beats the 1.6 gallon legal maximum by 20 percent while still passing flush-performance testing. Both are also available in a 1.6 GPF version for buyers who specifically want the extra drain-line carry water, such as older homes with long, low-slope waste lines. Because the same choice exists on both models, water efficiency does not tip the decision one way or the other; you pick the flush volume separately from the model. For a full breakdown of what that flush-volume number means, see our explainer on 1.28 GPF vs 1.6 GPF toilets.
One nuance worth knowing: at the same 1.28 GPF water volume, the Cimarron's canister flush extracts more flush power from those identical gallons than the Highline's flapper does, which is why the Cimarron posts the higher MaP score. So while the water use can be identical, the flush result is not. If you want the most cleared waste per gallon, the Cimarron's flush system is the more efficient design even at the same GPF rating. Both, of course, are far ahead of the old 3.5 to 7 gallon toilets they replace.
Below are both models laid out with their key specs and the honest case for each. Confirm the exact SKU for height, shape and GPF before you buy, since both lines span several configurations.
The Cimarron is the toilet to buy when you want Kohler's stronger flush and cleaner bowl, pairing the AquaPiston canister valve with a concealed, fully glazed trapway.
The AquaPiston canister sits in the center of the tank and lifts straight up, releasing water around the full rim for a forceful, even flush. That all-around wash is why the Cimarron reaches a 1,000 gram MaP score and keeps the bowl cleaner between scrubbings than a one-direction flapper flush.
Owner reviews consistently praise the strong flush, the quiet operation and the easy-clean skirted base. The most common notes are that it costs more than the Highline and that the canister seal, when it eventually wears, is best replaced with the matching Kohler part rather than a generic flapper.
If someone wants one Kohler toilet for the bathroom they actually use, this is the one we point to. The canister flush and glazed concealed trapway are real upgrades you feel every day, and the higher MaP score buys genuine peace of mind in a busy household. The extra cost over the Highline is money well spent on a primary toilet.
The Highline is the toilet to buy when you want a dependable Kohler at the lowest price, with a simple flapper flush that any generic part will repair.
The Highline's conventional flapper flush is a proven, simple mechanism that clears a normal load reliably and earns a solid MaP score in the 1.28 GPF version. It is the toilet Kohler has sold by the millions precisely because it just works without complication.
Owner reviews highlight the low price, the easy installation and the cheap, universal repair parts. The main reminders are that the exposed trapway takes longer to wipe around and that the flush has less force margin than the Cimarron's canister system for the heaviest loads.
The Highline is the toilet we recommend by the pair when someone is fitting out rentals or a whole house on a budget. You get Kohler durability and a genuinely reliable flush for less money, and the flapper valve means a cheap generic part fixes a leak years from now. For the bathroom you live in, we would step up to the Cimarron, but for everywhere else the Highline is the value champion.
Pick the Cimarron when flush performance, bowl cleanliness and appearance matter, which is to say for the bathroom you use most. Its AquaPiston canister valve produces a stronger, more even flush, its top configuration clears a 1,000 gram MaP load, its concealed glazed trapway resists clogs and keeps the base smooth and easy to wipe, and its 360-degree bowl wash keeps the interior cleaner between scrubbings. You accept a higher price and a Kohler-specific canister seal for repairs in exchange for a toilet that simply performs better every day. For a busy family bathroom or any primary toilet, the Cimarron is the one to buy. It is also Kohler's strongest answer when you cross-shop against the premium flush engineering covered in our TOTO vs Kohler toilets comparison.
Pick the Highline when price and repair simplicity outrank the last increment of flush force, which is to say for rentals, basements, guest baths and budget whole-house fit-outs. It flushes cleanly with a respectable MaP score, comes in the same heights and bowl shapes as the Cimarron, carries WaterSense certification in its 1.28 GPF version, and uses a conventional flapper valve that any generic part repairs cheaply. You give up the Cimarron's stronger flush, cleaner bowl wash and skirted look, but for a toilet that is not put through punishing daily use, the Highline delivers Kohler reliability at the lowest entry price. It is the value pick across the Kohler range, much as the Cadet 3 is for American Standard in our American Standard Champion 4 vs Cadet 3 comparison.
Kohler sits in the premium-design tier of American toilets, with strong flush engineering and well-regarded finishes and styling. Against American Standard, Kohler generally leads on design while American Standard leads on raw clog-fighting hardware like the Champion 4's oversized valve; our comparison of Kohler vs American Standard toilets lines the Highline and Cimarron up against the Cadet 3 and Champion 4. Against TOTO, which is widely regarded as the flush-engineering leader, the Cimarron is Kohler's closest competitor to the TOTO Drake on flush power, while TOTO's CeFiONtect glaze gives it an edge on bowl cleaning. If you are weighing TOTO's own lineup, our guide to the TOTO Drake vs UltraMax II is the next stop. Beyond the big three, Woodbridge and Swiss Madison bring modern skirted styling at value prices, and Gerber offers strong flushing per dollar with models like the Viper and Avalanche, so the field is wider than these two Kohlers if you are open to other brands.
Here is the buying-guide shortcut we would give a friend choosing between these two. Decide bowl shape and height first, based on who uses the bathroom and how much floor space you have, since both models offer the same options. Then ask one question: is this the toilet we use every day, or one we mostly maintain for others? Every-day toilet, buy the Cimarron for its flush and clean bowl. Maintenance or budget toilet, buy the Highline for its price and simple repairs. Both are durable Kohlers, so you are not choosing between good and bad, just between refined and economical.
These two Kohler toilets are not rivals so much as two answers to two different questions. The Cimarron is the better toilet on the metrics that define everyday quality: a stronger AquaPiston canister flush, a higher 1,000 gram MaP score, a concealed glazed trapway that resists clogs and a 360-degree bowl wash that stays cleaner. The Highline is the better buy when price and repair simplicity matter more than peak flush force, with a proven flapper valve, cheap universal parts and a lower price that makes sense for rentals and secondary baths. Both share Kohler's durable china, the same heights and bowl shapes, the same 12 inch rough-in and WaterSense certification in their 1.28 GPF versions. Decide whether this is the toilet you live with or one you maintain, then pick refinement (Cimarron) or value (Highline). Check the current price on Amazon for the exact configuration you choose.
Buy the Kohler Cimarron for your primary bathroom: its AquaPiston canister flush, 1,000 gram MaP score, concealed glazed trapway and 360-degree bowl wash make it the better-performing, cleaner, more refined toilet for daily use. Buy the Kohler Highline for rentals, basements and secondary baths, where its lower price and simple flapper repairs win. Both are dependable WaterSense-certified Kohlers; the choice is refinement versus value, not good versus bad.
The Cimarron flushes better. Its AquaPiston canister valve releases water around the full rim for a stronger, more even flush, and its top configuration posts a 1,000 gram MaP score against the Highline's roughly 800 grams. The Highline flushes reliably for normal use, but the Cimarron has more force in reserve for heavy loads in a busy bathroom.
AquaPiston is Kohler's canister flush valve. Instead of a flapper hinged on one side, the canister sits in the center of the tank and lifts straight up, opening a passage that lets water flow into the bowl from a full 360 degrees. That even, all-around release drives a stronger siphon and washes the whole bowl, which is the main reason the Cimarron out-flushes the flapper-valve Highline.
The Cimarron is more clog resistant. Its stronger AquaPiston flush pushes solids through with more force, and its concealed, fully glazed trapway gives waste a smooth, low-friction path to the drain. The Highline resists clogs well in normal homes, but the Cimarron has the larger margin for heavy or frequent loads.
Yes. Both the Highline and the Cimarron are sold in round and elongated bowls and in standard and Comfort Height (taller, chair-height) versions. Because the height and shape options overlap, choose those features based on your space and the people using the bathroom, then decide between the two models based on the flush, cleaning and price trade-off.
It depends on the bathroom. For a primary bathroom used many times a day, the Cimarron is better value because its stronger flush and cleaner bowl wash are felt daily. For rentals, basements and guest baths, the lower-priced Highline is the better value, especially since its flapper valve uses cheap, universal repair parts.
Yes, in their 1.28 GPF versions. Both toilets are offered in a 1.28 gallon-per-flush configuration that carries EPA WaterSense certification, meaning it uses 20 percent less water than the 1.6 gallon legal maximum while passing flush-performance testing. Both are also available in a 1.6 GPF version for buyers who want extra drain-line carry water.
The Cimarron is easier to clean. Its canister flush washes the bowl from a full 360 degrees, reducing streaking between cleanings, and its concealed skirted trapway has no exposed S-bend curves to dust and wipe around the base. The Highline's exposed trapway has more contours that collect dust and take longer to clean.
A concealed trapway means the curved waste channel is hidden inside a smooth, skirted lower body rather than showing as the familiar contoured S-bend on the side of the base. The result is a cleaner appearance and an easier-to-wipe exterior. The Highline uses a traditional exposed trapway, which has more crevices to clean around.
The Highline is easier and cheaper to repair. It uses a conventional flapper-style flush valve, so a generic flapper from any hardware store will fit, with no Kohler-specific part needed. The Cimarron's AquaPiston canister is durable and tends to hold a leak-free seal longer, but when it eventually wears it is best replaced with the matching Kohler canister kit.
Yes. Both use the standard 12 inch rough-in, the distance from the finished wall to the center of the floor drain, so either will drop into the footprint of a typical existing toilet without plumbing changes. Always measure your rough-in before buying, since 10 inch and 14 inch layouts exist, but for most homes either model fits the same space.
In their most common and best-selling forms, yes. Both the Highline and the Cimarron are typically sold as two-piece toilets with a separate tank and bowl. Kohler does offer a one-piece Cimarron in some markets. If you prefer a seamless one-piece for easier cleaning, confirm the exact SKU, since the common configurations of both are two-piece.
They are close, and both are quiet gravity toilets. The Cimarron's canister valve releases water smoothly and many owners describe it as a quiet, even flush. The Highline's flapper flush is also quiet for a gravity toilet. Neither is a loud pressure-assist model, so flush noise is not a meaningful reason to choose one over the other.
The Cimarron is the better master-bathroom choice. As a toilet you use many times a day, it rewards you with a stronger flush, a bowl that stays cleaner thanks to the 360-degree wash, and a skirted concealed-trapway look that is both more attractive and easier to wipe. The price premium over the Highline is justified for a primary, everyday toilet.
The Highline is the better rental-property choice. It costs less, which matters when buying several at once, and its conventional flapper valve means any tenant or handyman can fix a leak with a cheap, universal part. It still delivers reliable Kohler flushing and durability, so tenants get a dependable toilet without the higher cost of the Cimarron.
The Cimarron's top configuration posts a 1,000 gram MaP score, the highest the Maximum Performance test reports, meaning it clears a very large solid-waste load in a single flush under lab conditions. MaP scores can vary slightly by exact SKU and GPF, so confirm the specific model, but the Cimarron sits among the strongest-flushing Kohler toilets.
The Highline's common 1.28 GPF version posts a MaP score around 800 grams, a solid, above-average result that clears a large solid-waste load in one flush. It is lower than the Cimarron's 1,000 gram top score but still well above the threshold for reliable everyday flushing in a normal household.
The Cimarron is Kohler's closest competitor to the TOTO Drake on flush power, with both reaching a 1,000 gram MaP score in their top versions. TOTO's CeFiONtect glaze gives the Drake an edge on bowl cleaning, while Kohler often leads on finish and styling. Both are excellent gravity toilets; the choice usually comes down to brand preference and price.
If your current Highline works fine, there is no urgency. But if you are remodeling a primary bathroom, fighting occasional clogs, or want a cleaner-looking, stronger-flushing toilet, upgrading to the Cimarron is a worthwhile step up. The AquaPiston canister, higher MaP score and skirted concealed trapway are real daily improvements over the flapper-valve Highline.
It varies by configuration. Some Highline and Cimarron packages include a Kohler seat while others sell the bowl and tank alone, with the seat purchased separately. Always check the exact listing before you buy so you know whether a seat is included, and budget for a quality elongated or round seat that matches your chosen bowl shape if it is not.
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.
Researched by Marcus Bell · Last updated August 14, 2026 · Our review method
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