The tanks should be cleaned two or three times a year, ensuring that the floats and the suction pumps are clean and not clogged.
On each tank there is a tap for washing.
Remember to shunt correctly the valves on the fire-fighting/bilge electric pumps and on the fire-fighting manifold in the technical room.
It is advisable to pour a sterilizing product (Amuchina, Clorichina or similar), into the drains of washbasins, etc.., to prevent the formation of bacteria with the resulting bad smell release.
Anyway the best kind of maintenance for this kind of systems, is to use them correctly.
For maintenance of the WC itself, refer to the relevant manual.
Descaling of exhaust tubes
Before descaling check following:
The majority of the toilet bowls valves are not built for a “return” pressure. To avoid spillages during the descaling treatment the toilet bowls have to be disconnected and the pipes have to be plugged.
How to descale piping:
If sediments are still there, repeat the above procedure with a mix of 10% of pyropotassic tetraphosphate.