The black water system installed on board the yacht mainly consists in a black water holding tank with a capacity of 38 litres (10 gals).
The black water collection tank is located in the starboard side of the technical room.
The airtight tank’s air vent is located inside the chain locker.
Before being discharged overboard, the vented air flows through a special active carbon filter which eliminates bad smells.
The tank is equipped with a level switch which starts the discharge pump when it detects a high black water level, and deactivates it once the level has decreased.
The system is equipped with a timer which delays useless pump start ups due to yacht’s roll.
The level switch measures the water level inside the tank and sends alarm signals to the main electrical panel and to the toilet control pushbutton panels.
The electric toilet system is supplied and protected by the magneto-thermal switch located on the main electrical panel; it must be activated in order to allow toilet operation.
Black water drain in automatic mode takes place only after the activation of the corresponding magneto-thermal switch on the main electrical panel; it is possible to drain black water manually or automatically, by pressing the selector switch on the main electrical panel.
Sea discharges are blocked in the case of type-approval for navigation on Swiss lakes.
We recommend always checking the warning lights on the toilet ceiling lights and on the main electrical panel, and anyway, draining the tank before entering the harbour, to prevent being forced to return to open sea again to carry out its draining.
In case of yacht sinking risk, close the ball valve of the overboard drain.
For all pleasure yachts, drain at sea of on-board toilets is forbidden inside harbours, landings and moorings dedicated to crafts’ anchor riding, and also within the limit of beaches visited by swimmers, as stated in the single decrees of the Port Authorities.
All pleasure yachts classified for a number of passengers exceeding the 15 units and equipped with toilets can drain the untreated sewage at sea according to MARPOL rules, only BEYOND the limit of 12 (twelve) miles from the coast, while navigating at fixed track and at the maximum speed allowed, anyway not lower than 4 knots.
As it is possible to automatically empty the tank, we recommend that, according to the environmental rules in force, once entered in the harbour, you set the activation of the black water pump to manual mode only.
The direct overboard drain of the toilet is regulated by the rules in force in the area where the yacht is navigating.
When heading for the harbour, check the tank level and, if necessary, drain the tank at open sea before entering the harbour, always carefully taking into consideration the yacht’s position.
Except for organic waste, only very thin toilet paper can be discharged into the sea toilets.
The black water system is equipped with a water suction system from the main deck, without using the overboard discharge pump.
Suction occurs through the special opening, on the aft stairs leading to the sun area allows discharging black water by means of the suitable equipment available in the harbour.
The suction outlet, located inside the aft peak, is labelled with a “WASTE” indication, in order to avoid the accidental penetration of liquids such as water or fuel.
Black water system diagram