[SEPTVMaxi] Replacing Valinox Maxi filter

Ce filtre s'installe facilement, soit après le compteur d'eau, soit sous l'évier.
[SEPTVMini] Remplacement filtre valinox mini

- checking the proper functioning of the safety group and the general condition of the water heater
- cleaning and checking the cleanliness and flow of the condensate drain tube
- checking the connections and pipelines (leaks, humidity, rust, ...)

The service does not include:
- any repairs
- opening the water heater and replacing any parts if needed
[SREPEBEP] Minor maintenance of electric water heater