Installing Japanese toilet equipment is not something to be taken lightly: a few preliminary checks are essential, whether you opt for a simple bidet sprayer, a bidet seat, or a complete unit.

Points to check before you start:

• If your appliance is electric, make sure there is a dedicated socket in the immediate vicinity;
• The device must include a non-return valve, which is mandatory under European standards;
• Your existing drainage system must be compatible with the model you choose;
• If there is no flush tank, a pressure between 1.5 and 3 bars is required for the solenoid valves that control flushing to operate;
• The bidet sprayer nozzles must be made of a bacteria-resistant material.

Also remember to check that the dimensions and specifications of your new equipment match your current sanitary fixture or the space intended for it.

Let's now look at the installation steps, daily operation, and maintenance of these toilets.

How to install a Japanese bidet toilet?

The bidet sprayer kit

For just a few dozen euros, a bidet sprayer kit can turn any standard toilet into a bidet model without having to replace the seat. Featuring an adjustable slider, this compact accessory is installed between the ceramic and the seat, regardless of the bowl's width.

Most of these kits connect to the toilet's or sink's cold water supply to power the jet. Some models can also be connected to the sink's hot water circuit. Thanks to the flexible hoses and fittings provided, installation remains simple.

No plumber is required: the operation, which takes a few minutes, is accessible to everyone. Get a wrench, pliers, and scissors, and carefully follow the instructions, which may vary depending on the brand.

The bidet seat

Like the bidet sprayer kit, the bidet seat is fitted onto an existing bowl, replacing the original seat. Before installation, make sure it is compatible with your bowl: shape, size, spacing, and mounting hole placement. A dedicated guide allows you to check these compatibility criteria.

Installation is still accessible to a DIY enthusiast. The seat is also connected to the water supply via a three-way valve and the provided flexible hose. In addition to the usual tools (wrench, pliers, scissors), make sure you have Teflon tape to ensure the threaded fittings are watertight.

One point to watch: the nozzles must be precisely centered on the bowl to ensure a proper water spray. Do not hesitate to readjust as many times as necessary to achieve perfect positioning.

The complete Japanese toilet unit

Unlike the kit and the seat, completely replacing a sanitary unit with a complete Japanese toilet requires the intervention of a qualified plumber to ensure the reliability and longevity of the installation.

Installation time depends on the type of model: allow 2 to 3 hours for a floor-mounted toilet, compared to 2 to 3 days for a wall-hung toilet, due to the work involved in installing the concealed cistern frame.

The essential functions of a bidet toilet

Regardless of the type of equipment, Japanese toilets provide two main functions: anal washing and feminine washing. The level of equipment then varies depending on the model and budget.

The bidet sprayer kit
With no need for electricity, these kits stand out for their simplicity. Equipped with one or two retractable sprayers with self-cleaning nozzles, they offer:

• a directional jet;
• temperature and pressure adjustment;
• a self-cleaning nozzle system.

Unlike electronic models, they do not have a drying function.

The electronic seat
Powered by electricity, depending on the range, it offers additional options: massage, air drying, seat heating, LED lighting, automatic opening/closing, and even programmable settings.

The complete unit
This is the most feature-rich model, controllable via a wall-mounted control panel, a remote control, or a mobile app, depending on the version. Note: a remote control is standard on around 80% of models sold in France.

How to maintain your Japanese bidet toilet?

Bidet sprayer kit and bidet seat

Cleaning involves simply unclicking the accessory. Cleaning with a sponge, using soapy water with a little bleach, is sufficient for the contact surfaces and sprayer heads. Then dry with a towel.

Most models include self-cleaning nozzles that rinse automatically before and after each use—an asset for limiting bacterial proliferation and keeping the system clean.

If your seat shows signs of wear, it may be useful to find out when the right time is to replace it.

The complete Japanese toilet unit

Routine maintenance is done just like with standard toilets. Depending on the model, it is also possible to unclick the nozzles for more thorough manual cleaning.

Many manufacturers now offer rimless bowls, which are much easier to clean, as well as anti-limescale filters, particularly useful in regions where the water is hard.

Regular maintenance helps preserve the cleanliness, appearance, and lifespan of your equipment, while ensuring daily comfort and hygiene.