
Best French Toilets (2026)
ToiletsRefined, softly curved one-piece and skirted silhouettes with a polished, Parisian-elegant profile, paired with verified MaP flush scores rather than a stylist's…
Read the guideRoca has sold bathroom fixtures in more than 170 countries for over a century. But does the Gap toilet -- their most visible US-market model -- flush well enough to compete with TOTO, Kohler, and American Standard on American soil? Here is what the published data and aggregated owner experience actually show.
Research updated June 2026.
Roca The Gap is a well-built, European-design toilet with a 2-inch fully glazed trapway and 1.28 GPF efficiency, but its MaP flush-test score is not publicly disclosed and parts availability in the US remains a real limitation. Best suited for design-driven buyers who can source service support locally.
Roca was founded in 1917 in Barcelona, Spain, initially as a radiator manufacturer before pivoting to bathroom ceramics in the 1920s. Today the company operates manufacturing plants across Europe, Asia, and Latin America and holds a substantial share of the global sanitaryware market. Their entry into the US is driven by a broader strategy to capture the design-forward segment of the North American bathroom renovation market, where European aesthetics command premium appeal.
Roca is not a household name at American plumbing supply counters the way TOTO or Kohler is. You will not find it at Home Depot or Lowe's in most markets. Instead, Roca reaches US buyers through specialty tile-and-bath showrooms and online imports. That distribution model shapes everything about the ownership experience -- from installation to warranty service to finding a replacement fill valve three years after purchase.
Understanding that context matters before you evaluate whether The Gap is the right toilet for your bathroom. The flushing technology, build quality, and design language are genuinely strong. The after-purchase support ecosystem is where the calculus gets complicated for American buyers.
European toilet design tends to prioritize visual minimalism and material quality over the brute-force flush metrics that dominate North American purchasing decisions. Roca fits that pattern. The Gap looks exceptional in a modern bathroom, but buyers accustomed to referencing MaP scores or shopping for parts at a hardware store will encounter friction that TOTO Drake or Kohler Highline owners simply do not face.
Roca The Gap is available in both close-coupled (tank-on-bowl) and back-to-wall configurations and is commonly offered with a dual-flush system rated at 1.28 GPF for full flush and 0.8 GPF for half flush. The bowl is elongated, the rim height is approximately 16.5 inches in standard comfort-height versions, and Roca lists the trapway as fully glazed at 2 inches. EPA WaterSense certification status varies by specific SKU and import region.
| Spec | Roca The Gap (Dual Flush) | TOTO Drake II | Kohler Cimarron | American Standard Cadet 3 |
|---|---|---|---|---|
| Full Flush GPF | 1.28 GPF | 1.28 GPF | 1.28 GPF | 1.28 GPF |
| Half Flush GPF | 0.8 GPF | N/A (single) | N/A (single) | N/A (single) |
| Flush System | Siphonic / Dual Flush | Double Cyclone | Aqua-Piston | EverClean Siphonic |
| Trapway (min. diameter) | 2 inches (fully glazed) | 2.125 inches | 2.125 inches | 2.125 inches |
| MaP Score | Not publicly disclosed | 1000g (maximum) | 1000g (maximum) | 1000g (maximum) |
| EPA WaterSense | Select SKUs | Yes | Yes | Yes |
| Bowl Shape | Elongated | Elongated | Elongated | Elongated |
| Rough-In | 12 inches | 12 inches | 12 inches | 12 inches |
| Warranty | 5-year limited (varies by region) | 1-year limited | Limited lifetime | Limited lifetime |
One significant data gap for informed US buyers is that Roca has not submitted The Gap for independent MaP flush testing through the map-testing.com database, which is the industry standard for measuring flush performance in grams of solid waste cleared per flush. All the major domestic competitors -- including the TOTO Drake II, Kohler Cimarron, and American Standard Cadet 3 -- have achieved the maximum 1000g MaP score. Without that benchmark, comparing flush power objectively is not possible.
The Gap uses a conventional siphonic flush mechanism combined with a dual-flush push-button actuator mounted on the top of the cistern. The siphon action draws waste through the trapway by creating negative pressure in the drain line, which is the same fundamental physics used by TOTO, Kohler, and American Standard siphonic designs. The dual-flush feature allows the user to select 1.28 GPF for full-bowl clearing or approximately 0.8 GPF for liquid waste, providing meaningful water savings versus a fixed 1.6 GPF toilet.
Siphonic flush systems are standard in North America because they produce effective bowl-clearing suction and tend to leave bowls cleaner than the washdown-style flush common in continental Europe. The Gap's use of a siphonic system rather than a European washdown design is a deliberate choice by Roca to make the product function correctly with American drain-line configurations, which typically have longer horizontal runs than European plumbing.
The fully glazed trapway is the other standout feature of The Gap's hydraulics. A glazed trapway reduces friction for passing solids and prevents the porous ceramic surface inside the trap from trapping waste particles. TOTO's Double Cyclone system on the Drake and Drake II uses this principle extensively, and Roca applies the same reasoning to The Gap. The 2-inch diameter is slightly below the 2.125 inches offered by the TOTO Drake II and Kohler Cimarron, but the glazed finish compensates meaningfully for that slight size difference.
The absence of MaP score documentation does not automatically mean The Gap flushes poorly. It means there is no independent verification. Aggregated owner reviews on European import platforms consistently rate the flush as strong and clog-free under normal household use. That said, performance under stress -- bulky waste, heavy toilet paper -- remains anecdotal rather than measured. If verified flush data is a hard requirement, the TOTO Drake II at 1000g MaP and the American Standard Champion 4 at 1000g MaP are more documentable choices.
The Gap's dual-flush configuration at 1.28 GPF full / 0.8 GPF half meets EPA WaterSense criteria for water efficiency on the full-flush setting, and some specific SKUs have received formal WaterSense certification. A household switching from an older 3.5 GPF toilet to The Gap's dual-flush system can reduce toilet water consumption by roughly 50 to 60 percent depending on flush-choice behavior. However, buyers should verify WaterSense certification on their specific purchased model number, as certification is SKU-specific.
EPA WaterSense certification requires that a toilet flush no more than 1.28 gallons per flush at maximum and meet independent performance testing criteria. Because Roca's US import SKUs vary, and because WaterSense certification must be obtained model by model, buyers should check the EPA WaterSense product search for their specific Roca model number before claiming any utility rebates. Many municipal water utilities offer rebates of $50 to $150 per qualifying toilet replacement, making certification verification financially meaningful.
By comparison, the TOTO Aquia IV is a dual-flush siphonic toilet at 1.28/0.8 GPF with full WaterSense certification across its entire product line and MaP scores exceeding 800g on independent testing. If water efficiency AND documented flush performance are both priorities, the Aquia IV is a stronger documented choice. For the design-forward buyer who values The Gap's European silhouette above all else, the efficiency is still genuinely good -- just less formally documented in the US context.
Across aggregated reviews on European bathroom retail platforms, Houzz, and specialty bath showroom comment sections, The Gap earns consistently high marks for bowl cleanliness, quiet operation, and design quality. The most common complaints center on parts availability in the US and the difficulty of finding local plumbers familiar with the dual-flush cistern mechanism. Long-term owners in major metropolitan areas with access to European bath supply houses report fewer service problems than buyers in smaller markets.
The flush tone is one element owners consistently praise. European siphonic designs tend to produce a quieter, lower-frequency flush sound compared to American pressure-assist systems or even some high-flow gravity models. For master bathrooms adjacent to bedrooms, that quieter operation is genuinely valued.
Bowl cleanliness is the other recurring positive. The rimless or reduced-rim design on certain Gap configurations eliminates the under-rim area where bacteria and mineral deposits accumulate in traditional rim-jet toilets. This design choice -- more common in European ceramics than American -- reduces cleaning frequency and improves hygiene. For comparison, cleaning under the rim of a TOTO Drake or Kohler Highline Arc requires a bent toilet brush; many Gap owners report that a standard cleaning pass is sufficient.
Where owners run into trouble: when the dual-flush push-button actuator requires replacement, the part often must be sourced from a European plumbing supplier or ordered directly through Roca's distributor network. In markets with strong European bath presence (New York, Los Angeles, Miami, Chicago), this is manageable. In smaller markets, owners have reported multi-week wait times for basic cistern components. That single logistical reality separates The Gap's real-world ownership experience from a TOTO Drake or American Standard Cadet 3, where replacement parts are available same-day at most plumbing supply houses.
The parts availability issue is not a quality indictment -- it is a supply chain reality of buying a European brand in the American market. Buyers who purchase The Gap through a local bath showroom should confirm upfront that the showroom maintains parts stock or has a reliable distributor relationship. Getting that commitment before purchase is the most important due-diligence step that differentiates a smooth ownership experience from a frustrating one.
Against the TOTO Drake II, Kohler Cimarron, and American Standard Cadet 3, Roca The Gap competes most strongly on design language and dual-flush water efficiency but trails on documented flush performance data, parts availability, and retailer accessibility. Against the Woodbridge T-0001 and Swiss Madison Clarence -- which are also design-forward imports with limited parts networks -- The Gap holds its own on build quality and brand heritage, with Roca's 100-plus years of ceramics manufacturing providing more institutional confidence than newer import brands.
For a thorough comparison of all top-performing models, see our best flushing toilets guide, which covers MaP-tested options across every price tier. Here is how The Gap stacks up against the most commonly compared alternatives:
| Model | Flush Rating | GPF | MaP Score | Parts Availability | Design Style |
|---|---|---|---|---|---|
| Roca The Gap | Strong (anecdotal) | 1.28 / 0.8 | Not published | Limited (import) | European modern |
| TOTO Drake II | Excellent | 1.28 | 1000g | Excellent (nationwide) | Traditional-modern |
| Kohler Cimarron | Excellent | 1.28 | 1000g | Excellent (nationwide) | Transitional |
| American Standard Cadet 3 | Excellent | 1.28 | 1000g | Excellent (nationwide) | Classic |
| Woodbridge T-0001 | Good | 1.28 / 0.8 | Not published | Moderate (online) | Contemporary |
| Swiss Madison Clarence | Good | 1.28 / 0.8 | Not published | Moderate (online) | European modern |
| Gerber Avalanche | Excellent | 1.28 | 1000g | Good (regional) | Traditional |
The pattern is clear: buyers who need documented, data-verified flush power will choose TOTO, Kohler, or American Standard. Buyers who are optimizing for European design language and can accept the parts-availability trade-off will find Roca The Gap more satisfying than the Woodbridge T-0001 or the Swiss Madison Clarence, both of which lack the institutional manufacturing heritage that Roca brings from 100-plus years in ceramics production.
For context on how trapway size affects real-world clog resistance, see our trapway size guide, which explains why the difference between 2 inches and 2.125 inches matters less in daily use than the trapway surface finish. Also see our best dual flush toilets roundup and our one-piece vs two-piece toilet guide for context on the configuration trade-offs.
The TOTO Drake II is the single most-recommended toilet in North America among plumbers, bathroom remodelers, and flush-performance researchers. Its Double Cyclone flush system uses two nozzles rather than traditional rim jets to create a centrifugal water flow that cleans the bowl with 1.28 gallons and achieves a maximum 1000g MaP score. The Drake II costs less than The Gap in most markets and has same-day parts availability at plumbing supply houses in every US state.
Roca The Gap's advantage over the Drake II is purely in visual presentation and dual-flush capability. The Gap's European silhouette -- low-profile cistern, clean lines, concealed fixings -- reads differently in a modern bath than the Drake II's more utilitarian profile. If the bathroom is designed around European tile and fixtures and The Gap fits that visual program, the aesthetic coherence may be worth the trade-offs to a design-conscious buyer. If maximum verified flush performance and lowest total ownership complexity are the priorities, the Drake II wins without a close contest.
Both The Gap and the Woodbridge T-0001 are design-forward toilets that sell primarily through online channels and specialty showrooms rather than big-box retailers. Both offer dual-flush systems, elongated bowls, and modern European aesthetics. The Woodbridge T-0001 has a broader US online retail footprint and is somewhat easier to source replacement parts for through online channels. Roca's advantage is brand heritage: Woodbridge entered the market in the 2010s as a budget-design import, while Roca has been producing ceramics for more than a century with established quality control systems. Build quality and glaze consistency in The Gap are generally regarded as superior to the Woodbridge T-0001 in owner accounts, though neither has published MaP scores to verify flush claims independently.
Roca is one of the world's largest bathroom fixture manufacturers with over a century of ceramics production experience. Their build quality is well-regarded internationally. In the US, the brand's main limitation is parts availability and service network depth compared to domestic brands like Kohler or American Standard.
Roca The Gap is available through specialty tile-and-bath showrooms, European fixture importers, and select online retailers. It is not typically stocked at Home Depot, Lowe's, or standard plumbing supply houses. Major metro areas with significant European design communities (New York, Miami, Los Angeles) tend to have local showroom availability.
The Gap's dual-flush system is rated at 1.28 GPF for full flush and 0.8 GPF for half flush in the versions most commonly imported to the United States. This meets EPA WaterSense thresholds for water efficiency on the full-flush setting, though WaterSense certification status should be verified by specific SKU.
Roca has not submitted The Gap for independent MaP flush testing through the standard North American testing program at map-testing.com as of June 2026. This means there is no publicly available grams-per-flush benchmark to compare against MaP-tested models like the TOTO Drake II (1000g) or Kohler Cimarron (1000g).
WaterSense certification for Roca products is SKU-specific. Some Gap configurations imported to the US carry WaterSense certification while others do not. Buyers should verify their specific model number against the EPA WaterSense product list at epa.gov/watersense before applying for utility rebates.
The TOTO Drake achieves a 1000g MaP score, has nationwide parts availability, and costs less in most markets. The Gap offers dual-flush water savings and a more European design profile. For documented flush performance and ease of service, TOTO Drake wins clearly. For design-first buyers, The Gap's aesthetics may justify the trade-offs.
In most US markets, Roca-specific cistern components -- actuator buttons, dual-flush valves, and fill valves -- are not stocked at hardware stores. Parts must typically be ordered through Roca's distributor network or specialty plumbing importers. This is a meaningful practical difference from domestic brands and should be factored into purchase decisions.
Roca publishes the Gap's trapway as fully glazed with a 2-inch minimum diameter. For comparison, TOTO Drake II, Kohler Cimarron, and American Standard Cadet 3 all feature 2.125-inch trapways. The Gap's fully glazed finish reduces friction effectively, partially compensating for the slightly smaller diameter.
Yes. Roca offers The Gap in comfort-height configurations with a rim height of approximately 16.5 inches, which falls within the standard ADA-accessible range of 17 to 19 inches from floor to rim. Buyers should confirm the exact seated height for their specific SKU, as height specifications can vary slightly between configurations.
The Gap is primarily sold as a close-coupled two-piece design where the tank sits directly on the bowl and the visible gap between them is minimized for a cleaner appearance. Back-to-wall and wall-hung configurations are also available in the Gap series, allowing the cistern to be concealed in the wall cavity. The close-coupled two-piece is the most commonly imported version in the US market.
Installation follows standard 12-inch rough-in procedures used for most American toilets. The key differences are the dual-flush cistern connection and the push-button actuator assembly, which function differently from standard flapper-based American tank mechanisms. Installation is recommended through a plumber familiar with European dual-flush systems, especially to ensure proper actuator calibration for each flush volume.
Roca's warranty terms for products sold in the US are typically a 5-year limited warranty on ceramics, though the specific terms can vary by the importing retailer or distributor. This exceeds TOTO's standard 1-year limited warranty but falls short of the limited lifetime ceramic warranties offered by Kohler and American Standard. Warranty service requires working through Roca's US distributor network rather than directly with a domestic service center.
Roca offers both rimmed and rimless (called "rimless" in European nomenclature) versions within the Gap series. The rimless configuration eliminates the under-rim channel where bacteria and scale deposits accumulate, improving hygiene and reducing cleaning difficulty. Buyers should confirm which bowl configuration they are purchasing, as rimless and rimmed versions may have different SKU numbers in the US import catalog.
Both brands target design-conscious buyers with European-influenced aesthetics. Roca has significantly more institutional history and manufacturing scale, which generally translates to better ceramics consistency and glaze quality. Swiss Madison has broader US online retail distribution and somewhat easier parts sourcing through American channels. For pure design quality and build confidence, Roca holds an edge. For ease of US ownership logistics, Swiss Madison is marginally more accessible.
Yes. The elongated bowl version of The Gap is compatible with most universal elongated bidet seats, including electronic models from brands like TOTO and Kohler. The standard elongated bowl dimensions (approximately 18.5 inches front to back) match most aftermarket bidet seat specifications. Buyers should measure their specific Gap model before purchasing a bidet seat to confirm fitment.
Roca The Gap is primarily available in classic white (Blanco in Roca's catalog) with select configurations available in off-white or ivory tones. Matte finishes are not standard for the Gap series. Buyers seeking color-matched fixtures should confirm available Roca colorways with their specific showroom or distributor, as color availability can vary by import batch.
The fully glazed 2-inch trapway reduces the likelihood of waste adhesion inside the trap, which is a meaningful clog-prevention factor. Without MaP score documentation, precise clog-resistance performance cannot be benchmarked against competitors. Owner accounts on European platforms consistently describe normal household use as clog-free, but the absence of standardized testing data means documented clog-resistance claims cannot be made.
Owner reports consistently describe The Gap's flush as noticeably quieter than standard American gravity toilets and significantly quieter than pressure-assist designs. The dual-flush siphonic mechanism produces a low, sustained draw rather than a sharp rush. This quieter profile is reported as a genuine benefit in bedrooms adjacent to bathrooms, though it is not a specification that Roca publishes in decibel terms.
The standard Roca Gap toilet is designed for a 12-inch rough-in, which matches the most common US bathroom drain location. Non-standard rough-in sizes (10-inch or 14-inch) are not offered in standard Gap configurations for the US market. Buyers with non-standard rough-ins should measure carefully before ordering, as special-order modifications through European importers involve significant lead times.
These models serve different buyer profiles. The American Standard Champion 4 has a 2.375-inch fully glazed trapway (the largest in the mainstream residential market), a maximum 1000g MaP score, and same-day parts availability nationwide -- making it the dominant choice for flush-power prioritization. The Gap wins on design elegance, dual-flush water efficiency, and European aesthetics. For utility-maximizing buyers, Champion 4 is the clearer choice. For design-led renovations, The Gap competes on its own terms.
Roca The Gap is a genuinely good toilet with real engineering credentials behind it. A century of ceramics manufacturing, a fully glazed trapway, dual-flush efficiency, and clean European design language make it a compelling choice in the right context. The question is whether that context describes your bathroom and your ownership situation.
Buy The Gap if:
Do not buy The Gap if:
For design-forward renovation projects where the bathroom is the statement room of the house and the budget allows for specialty sourcing, Roca The Gap earns its place. For the buyer who wants documented data, national service support, and friction-free part replacement, TOTO's Drake II or UltraMax II delivers verified excellence without the import complexity. Both choices are defensible -- the gap between them is in priorities, not in fundamental quality.
Roca The Gap is a well-manufactured European toilet with a fully glazed trapway, dual-flush efficiency, and design language that stands apart from mainstream American models. Its meaningful limitations for US buyers are the absence of published MaP flush-test data and a parts supply chain that requires specialty sourcing rather than off-the-shelf availability. For design-led renovations in well-served markets, The Gap earns genuine consideration. For buyers who need documented flush performance and the peace of mind of nationwide service infrastructure, the TOTO Drake II, Kohler Cimarron, or American Standard Cadet 3 remain better-validated choices. The Gap is a premium product from a credible manufacturer -- just not the straightforward purchase that a domestically distributed toilet represents in the American market.
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 June 28, 2026 · Our review method

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