Check if your tank has the level sensor installed, if it does not have it we can recommend the DTM04 . Not having a level sensor, apart from being against the regulations, overfilling can cause you many headaches during your holidays.

3. If your tank capacity does not allow you much autonomy, so that you do not have to constantly check its level, we recommend that if your toilet is electric or vacuum, you add a relay with a lock and a small panel in the bathroom with a red light that says "Tank full" or "Do not use", to prevent the toilets from continuing to send waste to the tank and reaching overfill.