Installing a wall-hung Japanese toilet often raises the same question among our customers: is my current concealed cistern compatible?

The standards to know

The vast majority of wall-hung Japanese toilets comply with the standard European mounting distance of 180 mm between the fixings, making them compatible with most concealed cisterns on the market (Geberit, Grohe, Wirquin...). However, it is essential to check the maximum load supported by your cistern, as these models are heavier than a conventional toilet bowl due to the built-in electronics.

The power supply, the often-overlooked point

Unlike a traditional toilet, a Japanese toilet requires an electrical outlet in the immediate vicinity, ideally concealed behind the cistern or in a technical cabinet. If your bathroom does not yet have an electrical point in this area, you will need to plan for this work before installation — a detail to anticipate from the start of the project.

Hire a professional or install it yourself?

The hydraulic connection remains accessible to a skilled DIYer, but the electrical supply in a wet room requires strict compliance with NF C 15-100 standards. When in doubt, a qualified plumber-electrician remains the safest solution.