Roca The Gap SQUARE Compact Rimless Toilet 36.5 cm | Dual Outlet

Why the toilet you choose matters more than you think

The toilet is the most-used fixture in any bathroom — used dozens of times a day, every day, for decades. Yet it's also one of the elements that receives the least consideration during a renovation, often chosen last and with the smallest budget allocation. That mismatch between usage intensity and purchasing attention is one of the main reasons many people find themselves dealing with poor hygiene, difficult cleaning, or premature replacement within just a few years.

The Roca The Gap Square Rimless Complete Toilet Set (ref. A342479000 + cistern + seat and lid) is designed to address exactly those problems: it combines a hygiene-first technology, a water-efficient dual-flush system, a durable antibacterial seat, and a coherent square-format aesthetic into a complete, ready-to-install package. This guide explains what each of those features means in practice, who this toilet is designed for, and what to consider when choosing between the available configuration options.

Technical specifications at a glance

What Rimless technology actually means — and why it matters

The word "rimless" describes the absence of the traditional internal rim that runs around the inside of the toilet bowl. On conventional toilets, that rim serves as the channel through which flush water is distributed around the bowl. It does its job — but it creates a structural problem that affects every toilet user: the rim forms a hidden cavity that is almost impossible to clean properly.

In a standard rimmed toilet, flush water and waste residue accumulate in the space behind and under the rim with each use. That space is dark, damp, and ventilated only through the bowl itself — ideal conditions for the development of bacteria, limescale, and biofilm. Even with regular cleaning, the tools available to most people (brushes, spray cleaners) cannot effectively reach behind the rim. Over time, mineral deposits and biological growth build up in that inaccessible space, regardless of cleaning frequency.

The Rimless design of The Gap Square eliminates that hidden space entirely. The bowl has no internal overhang or rim channel — it is a smooth, open surface from top to waterline. Flush water is delivered through two directional jets positioned at the top of the bowl that create a powerful, swirling flow covering the entire interior surface. The result is:

• More effective flushing with less water, since the jet is directed rather than distributed through a passive rim channel

• No hidden accumulation zones — every surface the flush contacts is also a surface a brush can reach

• Visibly cleaner appearance between cleanings, as there is no rim shadow to conceal residue

• Lower bacterial counts in independent hygiene testing, because the absence of the rim eliminates the primary surface where biofilm develops between uses

For households with children, elderly family members, or anyone with heightened hygiene concerns, this is not a cosmetic difference — it is a functional one that affects the bathroom's actual cleanliness level on a daily basis.

The dual-flush cistern: responsible water consumption by design

The cistern included in this complete set features a dual-flush mechanism offering two discharge volumes: 4.5 litres for a full flush and 3 litres for a reduced flush. The choice between the two is made via the standard two-button actuator on the cistern top.

To put those numbers in context: older single-flush cisterns commonly used between 9 and 13 litres per flush. The EU's current efficiency benchmark for new toilets sits at 6 litres maximum for a full flush. The 4.5 L / 3 L specification of this cistern significantly outperforms that benchmark.

In a household of four people, assuming an average of five uses per person per day, the difference between a 9 L cistern and a 4.5 L / 3 L dual-flush cistern represents a saving of approximately 25,000 to 30,000 litres of water per year — a meaningful reduction in both environmental impact and water bills, sustained indefinitely over the product's lifespan.

The cistern inlet can be configured in two ways depending on your existing plumbing:

• Bottom inlet (left outlet): the water supply enters through the base of the cistern

• Side inlet: the supply enters laterally, with a chrome trim piece to cover the unused bottom outlet

Both options are included in the complete set, and the choice should be made at the time of installation based on the location of the existing water supply connection.

The bowl: square geometry and why it defines the character of the bathroom

The Gap Square collection sits at one specific point in the design spectrum of Roca's extensive portfolio: geometric, contemporary, and defined by right angles and flat surfaces rather than the soft curves of organic collections.

The square format is not simply an aesthetic choice — it shapes the entire visual relationship between the toilet and the surrounding space. In a bathroom with rectangular tiles, angular shower enclosures, straight-edged vanity units, and rectilinear mirrors, a toilet with square proportions reads as part of an intentional design language rather than an object that was placed there. The visual consistency of the space communicates precision and deliberate design.

Conversely, in a bathroom with curved fittings, organic shapes, and soft lines, the square format can create a deliberate and effective contrast — the kind of studied tension between geometric and organic forms that characterises much of high-quality contemporary interior design.

The bowl dimensions — 36.5 cm deep × 65 cm wide × 79 cm total height — represent a compact footprint that is compatible with a wide range of bathroom sizes without compromising internal seating volume. The 65 cm width is a standard dimension that fits between most installation gap constraints, while the 36.5 cm depth keeps projection from the wall to a minimum.

Supralit® seat and lid: antibacterial material with everyday durability

The seat and lid included in this set are manufactured from Supralit®, a high-density thermosetting resin that is the industry standard for premium toilet seats. Understanding what distinguishes Supralit® from lower-quality seat materials helps explain why it is specified in Roca's mid-to-high range products.

Why seat material matters

Toilet seats are exposed to a uniquely demanding set of conditions: repeated mechanical stress from sitting and standing, thermal cycling from body heat and ambient temperature variation, chemical exposure from cleaning products, and continuous contact with a humid environment. The material must maintain structural integrity, surface quality, and hygienic properties under all of those conditions simultaneously.

Standard polypropylene (PP) seats — the most common material in the mass market — are lightweight and inexpensive to produce. However, polypropylene is a porous material at a microscopic level, which means that over time, surface scratches (from brushes, cleaning products, and normal wear) create microscopic fissures where bacteria can colonise. PP seats also tend to yellow and discolour with age due to UV exposure and repeated chemical contact.

Supralit® is a thermosetting resin, which means its polymer chains cross-link during curing, creating a material structure that is fundamentally denser and harder than polypropylene. Key properties:

• Non-porous surface: the cured Supralit® surface does not develop the micro-fissures that harbour bacteria in PP seats — it can be cleaned to genuinely hygienic levels with normal cleaning products

• Dimensional stability: the material does not flex or deform under normal loads, maintaining its shape and the integrity of the hinge connection throughout its service life

• Colour stability: Supralit® resists UV yellowing and discolouration from cleaning agents significantly better than polypropylene

• Temperature resistance: the material tolerates the range of temperatures in a domestic bathroom without warping or stress cracking

The antibacterial treatment built into the Supralit® used in this seat provides an additional layer of protection by inhibiting bacterial growth on the seat surface between cleanings. This is particularly relevant in shared bathrooms and family households.

Stainless steel hinges

The seat hinges are fabricated in stainless steel rather than the plastic hinges found on economy seats. This is a detail that reveals itself over time: plastic hinges are subject to stress fractures from repeated opening and closing, and the chrome coating applied to them degrades with cleaning product exposure, eventually revealing yellowed or pitted underlying material. Stainless steel hinges maintain their appearance and structural integrity indefinitely under normal domestic use conditions.

Configuration options: choosing the right variant for your installation

This complete set is available in four variants combining two seat options and two cistern inlet options:

Seat option 1: Standard lid (A80147000B)

The standard lid closes under its own weight. This is the appropriate choice for households that prefer the simplicity of a mechanical lid without cushioning systems — and for those who are replacing an existing standard-close seat and want consistent behaviour.

Seat option 2: Soft-close lid (A80147200B)

The soft-close mechanism uses a hydraulic damper integrated into the hinge to slow and cushion the closing motion of both the seat and the lid. The lid descends slowly and silently regardless of how it is released. Benefits:

• Eliminates the sharp noise of a lid dropped onto the bowl — relevant in bathrooms near bedrooms or in homes with light sleepers

• Prevents the mechanical impact that over time causes micro-fractures in the hinge mounting points on both the seat and the bowl

• Extends the effective service life of both the seat and the bowl by eliminating the repeated shock load of an uncontrolled drop

The soft-close variant represents a meaningful improvement in daily experience and is the recommended choice for all but the most budget-constrained situations.

Cistern inlet: bottom vs. side

This choice is dictated entirely by your existing plumbing installation:

• If your current water supply enters through the floor or the lower portion of the cistern cavity, select the bottom inlet variant

• If your current supply enters laterally through the wall, select the side inlet variant

If you are unsure, your plumber can confirm the inlet position during the pre-installation survey. The chrome trim cap included with the side inlet version covers the unused bottom outlet port cleanly.

Dual outlet bowl: horizontal and vertical installation compatibility

One of the practical advantages of The Gap Square bowl is its dual outlet configuration: the waste outlet can be routed either horizontally (through the wall behind the toilet) or vertically (through the floor beneath it). This means the same bowl is compatible with both floor-outlet and wall-outlet plumbing configurations without requiring adapters or modifications.

In practical terms, this matters most when:

• You are replacing an existing toilet and the current waste configuration is already set

• You are undertaking a renovation where the plumbing route has not yet been determined

• You are working in a building where different floors have different waste configurations

The dual outlet eliminates the risk of purchasing a single-outlet toilet that is incompatible with your installation, which is one of the most common — and most frustrating — mistakes in bathroom renovation projects.

Installation overview

Professional installation by a qualified plumber is strongly recommended for the complete set. The installation process involves:

1. Preparing the floor fixing points — the bowl mounts to the floor via two fixing bolts; the distance between mounting holes is 16 cm

2. Connecting the waste outlet — either horizontal or vertical depending on the configuration selected

3. Mounting and levelling the bowl — the bowl must be perfectly level to ensure correct flush dynamics and seat alignment

4. Installing the cistern — the cistern mounts directly onto the rear of the bowl via the cistern-to-pan connection bolts

5. Connecting the water supply to the chosen inlet (bottom or side)

6. Installing the seat and lid — the stainless steel hinges mount to the seat mounting points on the bowl rim (16 cm hole spacing)

7. Adjusting the flush volumes — the cistern float and flush valves can be adjusted by the installer to set the 4.5 L / 3 L volumes precisely

The complete set includes all hardware necessary for installation. A silicone seal between the base of the bowl and the floor is recommended to prevent moisture ingress and simplify floor cleaning.

⚠️ Installation should be carried out by a qualified plumber. Incorrect installation of the waste connection can result in siphon failure and odour issues that are not covered by the product warranty.

About Roca: over 100 years of bathroom manufacturing expertise

Roca was founded in Spain in 1917 as a cast-iron radiator manufacturer. By the 1920s the company had expanded into bathroom fixtures, and over the following century grew into one of the world's leading bathroom product manufacturers — present in over 170 countries, operating more than 80 production facilities, and investing consistently in both design and manufacturing technology.

That history is relevant to a purchasing decision in a concrete way: Roca produces its own porcelain, controls its own manufacturing quality standards, and backs its products with a 3-year warranty against manufacturing defects that is supported by a well-established service and spare parts network across Europe. When you purchase a Roca product, you are purchasing from a manufacturer that will exist to honour that warranty and supply spare parts when needed — a consideration that is far from trivial when choosing a product intended to last 15 to 25 years.

The 3-year warranty on this complete set covers the bowl, cistern, seat, and lid against manufacturing defects under normal use conditions. This is one of the longer standard warranties in the bathroom fixtures category at this price point.

Who is this toilet set the right choice for?

The Roca The Gap Square Rimless Complete Set is the right choice if:

• You prioritise hygiene and want the most cleanable bowl geometry available

• You are renovating a bathroom with a square, geometric, or contemporary design language

• You want to reduce water consumption without compromising flush performance

• You want a complete, matched set from a single source rather than combining components from different manufacturers

• You need flexibility in the waste outlet direction (horizontal or vertical)

• You value a manufacturer with a proven track record and European service network

Consider alternatives if:

• Your bathroom has an organic, curved aesthetic — in which case The Gap Round or the Ona collection may be more appropriate

• You are working with an extremely compact space — in which case The Gap Square Compact (36.5 cm footprint) may be the better fit

Summary: what's included and key specifications

✅ Rimless bowl — no hidden rim cavity, hygienic open surface, powerful directional flush
✅ Dual outlet — compatible with horizontal (wall) or vertical (floor) waste configurations
✅ Dual-flush cistern — 4.5 L full flush / 3 L reduced flush
✅ Vitreous porcelain bowl and cistern — hard-fired, non-porous, long-lasting
✅ Supralit® antibacterial seat and lid — dense, non-porous, hygienic, colour-stable
✅ Stainless steel hinges — corrosion-resistant, mechanically stable
✅ Seat options — standard close or soft-close (cushioned fall)
✅ Cistern inlet options — bottom or side, with chrome cover for unused port
✅ Compact dimensions — 36.5 cm × 65 cm × 79 cm
✅ 3-year warranty against manufacturing defects
✅ SKU: A342479000 + A341470000/A341471000 + A80147000B/A80147200B | EAN: 8433290040975