Aspects prior to the installation of the In-Wash®

• Choose the right model: Roca offers the In-Wash® in floor-standing (back-to-wall) and wall-hung versions. The floor-standing version includes a coupled cistern (low tank) and is installed on the floor, while the wall-hung version is fixed to the wall (elevated from the floor) and requires a support system (concealed frame) capable of bearing its weight. Select the model according to the bathroom configuration: floor-standing models are ideal for renovations without construction work (direct replacement of a traditional toilet), and wall-hung models provide a modern style and facilitate floor cleaning, although they involve installing a concealed cistern or support structure.
• In-Tank® Technology (integrated cistern): Some recent models of In-Wash®, like the In-Wash® Inspira series, integrate the cistern within the bowl itself using In-Tank® technology. This is a great advantage in renovations, as they do not require an external or concealed tank, saving space (up to ~20 cm on the wall) and simplifying installation. You will only need a cold water supply and an electrical connection for its operation, without having to carry out masonry work to embed the cistern. On the other hand, models without In-Tank (e.g., In-Wash® Ona wall-hung) connect to a conventional concealed cistern (like Roca Duplo systems) or a low back-to-wall cistern.
• Location of drains and supplies: Check the type of drain in the bathroom: Roca's floor-standing In-Wash® toilets come with dual (vario) outlet that adapts to both horizontal wall drains and vertical floor drains (via a connection elbow). Make sure you have the correct elbow kit if the outlet is vertical. In wall-hung models, the drain will be horizontal to the wall. Also, ensure you have a nearby water supply on the wall (usually lower lateral) and, very importantly, an electrical connection point nearby. Ideally, there should be a grounded outlet at a safe distance from wet areas (by regulation, outside the bathtub/shower volume) or plan to run an electrical cable to the toilet location. It only needs connection to the cold water supply, as the toilet heats the water internally.
• Tools and materials: Prepare the usual plumbing tools: drill and bits for wall or floor (depending on the model) for fixings, adjustable wrench for connections, level, silicone or putty to seal the base, screwdrivers, and for wall-hung installations, the elements of the concealed frame (if not yet installed). Also, have on hand the components included with the In-Wash®: they usually come with a connection hose to the water, shut-off valve, filter/softener if included, remote control and its supports, etc. Read the specific model manual before starting to familiarize yourself with the parts and assembly scheme.

Step by step: installation of a Roca In-Wash® toilet

1. Positioning and securing the toilet: Present the ceramic base of the toilet in the desired location. Mark on the floor (or wall, if suspended) the fixing points and the position of the drain. In floor-standing models, align the bowl outlet with the drain sleeve and ensure it is centered and well-fitted to prevent leaks. If it's a suspended model, pre-install the concealed frame (or ensure the existing one is correctly installed at the appropriate height, usually ~40-42 cm from the finished floor to the bowl outlet) and secure the studs and drain connection as per the instructions. Drill where necessary and install the screws and plugs provided, firmly securing the bowl in place. It is crucial to level the toilet correctly and ensure it is solidly anchored, without movement.
2. Drain connection: Once the bowl is secured, connect the toilet to the drain. For floor-standing models with horizontal outlets, this will involve inserting the rubber sleeve into the wall and attaching it to the rear outlet of the toilet before pushing the unit into its final position. In the case of a vertical outlet to the floor, place the vertical elbow (floor siphon) aligned between the floor flange and the bowl outlet. Apply sealant or gasket as directed by the manufacturer to ensure watertightness. For suspended models, verify that the rubber gasket between the bowl outlet and the frame elbow is correctly positioned when hanging the toilet on the studs. Tighten the fixing nuts of the suspended toilet and place the covers.
3. Cold water supply connection: Shut off the main stopcock before handling the installation. Place the angle valve (shut-off valve) on the wall water supply if one is not already present. Connect the flexible hose provided between the water valve and the water inlet of the toilet (usually located at the rear or bottom of the tank/bowl). Many models incorporate a filter or descaling system at this inlet: do not forget to install it as indicated in the manual, to protect the washing mechanism from impurities and scale. Tighten the connections well (first by hand and then gently with a wrench, without over-tightening to avoid damaging the threads) and leave the shut-off valve closed for now. Note: The supply must be cold water only. Do not connect hot water as the unit has internal heaters to warm it to the desired temperature.
4. Electrical connection of the toilet: This step distinguishes In-Wash® toilets from traditional ones. You have two options: plug in the toilet to a nearby socket or hardwire it to the electrical network permanently (according to recommendations and regulations, a plug is usually preferred for easy disconnection of the equipment). If you are going to use a plug, ensure it is placed at a safe distance from the shower/bathtub (for electrical safety) and preferably protected by a residual current device (RCD). Many installers run the electrical cable inside the toilet itself: pass the power cable through the hole provided in the base or the back of the bowl (the manual indicates the route). In-Wash models usually come with a cable with plug already connected to the internal mechanism; in other cases, the cable is connected using numbered terminals or quick connectors. Follow the electrical connection instructions step by step: usually, it involves plugging in a specific connector that joins the electronic unit of the seat with the power cable you brought out through the base. Make the connections with the main switch off and ensure they are firm. Leave the plug prepared but do not energize yet the equipment until the complete assembly is finished.
5. Assembly of the electronic module and seat: The In-Wash® toilet comes with electronic components (washing nozzle, valves, heater, etc.) integrated into a module usually housed in the seat/lid area. In some models, the lid and seat are delivered disassembled to facilitate installation. Typically, we first secure the ceramic base (already done in previous steps) and then install the electronic seat-lid assembly. To do this, remove the lid and seat from the electronic body following the manual (they are usually attached with a guide or easy-release anchoring system). This will give you access to the back of the toilet, where you will find the electrical connector and the internal water inlet of the mechanism. Connect the internal hose coming from the electronic mechanism to the water inlet protruding from the bowl (ensure the click or thread is well-fitted). Also, connect the internal plug that provides power to the module (it usually matches a numbered plug that fits into its corresponding port). When both connections (water and electricity) are secured, insert the electronic module into the bowl: snap it into place using the plastic tabs or guides until you hear a “click” of fixation. Next, reinstall the seat and lid on their hinge or supports, securing them as indicated by the manufacturer (many incorporate quick-release and SoftClose damping systems for smooth closing). Tighten the hinge screws if necessary and place the covers. Verify that the lid opens and closes correctly, and that the seat is stable. Finally, attach the remote control holder to the wall at a convenient height – a holder with adhesive or screws is usually provided – so the user can hang the remote in an accessible place.
6. Start-up and final tests: With everything physically installed, proceed to open the water stopcock to fill the system. In models with an integrated In-Tank cistern, you will probably hear the system start its water load and possibly a fan (air system) activate briefly due to the air discharge technology (Soft Air). Check that there are no leaks in the hose connection or the drain sleeve. Next, connect the electrical power of the equipment (plug into the network or activate the dedicated circuit breaker). Many smart toilets perform an auto-test or initial calibration when turned on: a courtesy LED light may turn on, or the washing nozzle may move automatically for self-cleaning. Wait a few moments and then test the basic functions: press the flush button (some models have a hidden side button for manual flush, or use the remote control to activate the flush) and check that the water flow works and that the toilet flushes well. Also test the washing function by extending the nozzle (without sitting, some equipment requires activating the presence sensor by covering it or using a test mode for the shower to come out without a user sitting). Verify that water comes out of the nozzle and then the drying air. Check that the night LED light turns on (if applicable) and that the remote control controls all functions. Many remotes come pre-synchronized; otherwise, follow the instructions to pair it with the toilet. Ensure that the presence sensor works (it usually prevents water from coming out if no one is sitting, to avoid accidental splashes). Finally, consult the Roca Connect mobile app if the model supports it (the In-Wash® Ona allows configuration via app): connect the device as instructed and verify that you can adjust parameters from the smartphone. After confirming that everything works correctly and without leaks, you will have completed the installation.

Practical tips and common mistakes to avoid

• Check the water pressure: In-Wash® toilets incorporate solenoid valves and wash systems sensitive to pressure. Roca specifies an optimal pressure range (e.g., between ~0.1 and 0.7 MPa). If the household pressure is too low, the wash/flush performance may suffer; and if it's too high, install a pressure reducer to avoid straining the mechanism.
• Respect electrical safety distances: Never place the power outlet in areas where it can get wet. Ideally, the plug should be at least 60 cm away from bathtubs or showers (outside “protection volumes”) and preferably on the opposite side of the shower. Use a plug with a ground connection and protected by a differential.Do not use extension cords provisionally; the electrical connection must be fixed and secure.
• Don't forget the accessible shut-off valve: It is essential to install an exclusive shut-off valve for the toilet, so that the supply to the appliance can be turned off for maintenance without cutting off water to the entire house. Make sure to leave it visible or accessible (for example, inside the nearby under-sink cabinet) if the toilet covers it.
• Install the filter and anti-scale system correctly: If the model includes an inlet filter or a descaling cartridge, place it according to the instructions. A common mistake is to forget it, which can cause nozzle blockages or scale buildup on the heaters. Also, schedule the self-cleaning and descaling routines (many In-Wash® have an automatic mode that you must activate periodically with the remote).
• Verify the presence sensor: If no water comes out when testing the wash, it could be because the sensor does not detect a user (for safety). Some novice installers think there is a fault, but it is the system functioning correctly. Check the manual for test or “installation” mode usually included to activate the nozzle without sitting (e.g., cover the sensor with your hand).
• Tighten connections and screws just right: A typical mistake is over-tightening the ceramic anchoring screws or the water connection nuts, which can crack the porcelain or damage the threads. Tighten firmly but without excessive force. Use the supplied washers and gaskets for a watertight fit and check everything before covering with trim.
• Properly place the discharge flange gasket: In close-coupled models, the connection between the cistern and the bowl (in low-tank toilets) must seal correctly. If you notice leakage between the tank and bowl at the first fill, the discharge gasket is probably not properly seated or the cistern mounting screws are not balanced. Adjust them again and verify. In In-Tank models, follow the factory assembly process exactly, as the tank is integrated and sealed from the origin (do not disassemble internal parts unnecessarily, as you could compromise its watertightness).
• Configure the functions according to the end user: Leave the toilet configured in a comfortable “default” state. For example, medium water and air temperature level, neutral nozzle position, courtesy light activated. Briefly explain to the client how to adjust to their liking or provide the manual. A professional installer not only installs but also ensures that the client understands the basic operation of the new equipment.

In-Wash® Rimless models by Roca available at GroupSumi

In-Wash® floor-standing toilets

• Smart toilet In-Wash® Ona Rimless wall-mounted – Floor-standing model with compact low cistern. It offers a modern design with smooth lines (collection Ona) and all the smart functions: adjustable hot water wash and air drying, self-cleaning nozzle with ultraviolet disinfection light, and dual flush 4.5/3 L for low consumption. It incorporates connection with the Roca Connect app, allowing customization of settings from the mobile. It is ideal for renovations where In-Wash technology is desired without altering the wall, as it installs like a conventional wall-mounted toilet. Its advantages include easy cleaning thanks to the rimless design (no nooks for dirt) and simple maintenance with an automatic descaling program.

Featured product

Roca In-Wash® Ona Rimless Wall-Mounted Smart Toilet

Roca In-Wash® Ona Rimless wall-mounted smart toilet with washing and drying functions, controllable via the mobile app. Compact and efficient design.

• Hot water washing and adjustable hot air drying.
• Self-cleaning nozzle with ultraviolet light and descaling.
• Dual flush of 4.5/3L and customisable control via the Roca Connect app.

€1,196.00€2,063.94

• Smart toilet In-Wash® Inspira Rimless wall-mounted – Intelligent model from the Inspira series with floor installation (back-to-wall). It combines advanced technology with a minimalist aesthetic. It stands out for integrating the cistern in the bowl (In-Tank®), eliminating the external tank from view and simplifying installation. Its hygiene functions include customizable washing (anal, oscillating, perineal modes) and hot air drying, with temperatures adjustable to the user's preference. It comes with a remote control to manage all operations (including flushing, as the flush is electronic) and a courtesy LED light for nighttime use. Additionally, it incorporates a presence sensor and a lid with SoftClose damped closing. This premium model offers maximum user comfort and space-saving in the bathroom, maintaining the ease of installation of a wall-mounted toilet (it connects to the water supply and electrical network without additional work).

Featured product

Roca Rimless In-Wash® Inspira Wall-Hung Smart Toilet

The In-Wash® Inspira smart toilet by Roca offers advanced washing and drying functions, Rimless® design, and remote control. It ensures hygiene, comfort, and technology in a wall-mounted format.

• Customisable washing and drying functions.
• Rimless® design for enhanced hygiene and easy cleaning.
• Remote control with low battery alert.

€1,599.00€2,865.90

Suspended In-Wash® Toilets (wall-mounted)

• In-Wash® Ona Rimless suspended smart toilet – Suspended version of the In-Wash Ona, designed for contemporary-style bathrooms. It is anchored to a built-in system (compatible with Roca frames Duplo One / Duplo S) with the bowl floating without touching the floor. It offers the same smart washing and drying functions with temperature regulation, a self-cleaning nozzle with UV light, and also an efficient dual flush 4.5/3 L. Without a pedestal, it facilitates floor cleaning and provides visual spaciousness to the space. It is controlled via remote control and also allows adjustments via a mobile app. Its main advantages are aesthetics and cleanliness: the floor free of obstacles and the rimless interior make it easier to keep the bathroom spotless. It is the ideal option when seeking total integration with the wall (requires the pre-installation of a built-in tank or, if chosen, it can be combined with an In-Tank module although in suspended format it usually goes with a wall-mounted cistern).

Featured product

Roca In-Wash® Ona Rimless Wall-hung Smart Toilet

Roca In-Wash® Ona Rimless Wall-Hung Smart Toilet with washing and drying functions. Control and configure from the mobile app.

• Washing and drying functions with adjustable temperature.
• Self-cleaning nozzle with ultraviolet light and descaling.
• Compatible with Roca Duplo One / Duplo S systems and dual flush 4.5/3L.

€1,101.99€1,902.81

• Smart toilet In-Wash® Inspira Rimless suspended – Suspended toilet from the Inspira range, at the forefront of innovation. It incorporates In-Tank® technology in a suspended format, integrating the cistern into the ceramic body itself to eliminate the typical built-in cistern (only requires a frame or support for mounting). The result is an ultra-minimalist look, with the wall free of actuator plates. All functions are activated via remote control or discreet side buttons. It provides maximum hygiene with the Roca Rimless® system and self-cleaning nozzle, in addition to personalized comfort: multiple nozzle position adjustments, water temperatures (33º, 36º, 39º), and drying air (40º, 50º, 60º). Includes presence sensor, ambient LED lighting, and an ergonomic design. Its main advantage is combining the clean look of a suspended toilet with the simplified installation of a wall-mounted one, as it does not require an additional built-in tank – just connect water and electricity. It is perfect for high-end projects where the latest in bathroom technology and design is sought.

Featured product

In-Wash® Inspira Wall-Hung Smart Toilet Roca Rimless

The Roca In-Wash® Inspira wall-hung smart toilet combines advanced technology, minimalist design, and customisable washing and drying functions with the hygienic Roca Rimless® system.

• Wall-hung design with dual flush 4.5/3L.
• Washing, drying function, and LED night light.
• Self-cleaning nozzle with adjustable positions.

€1,516.00€2,715.84

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