According to HELCOM "Helsinki Commission," since 2005 all ships must be equipped with a waste holding tank. The HELCOM guidelines specify that boaters on the North and Baltic Seas must equip their ships (and pleasure crafts!) with waste retention systems. Whether flexible holding tanks (CAN PLASTIC), grey water tanks (JOHNSON PUMP) or a combination of both. In our online shop you will find a large selection of different designs of holding tanks. Buy the right one for your boat now!