It centralizes all drains (shower, sinks, kitchens, toilets etc.) to avoid bores in the hull. Universal model supplied without pump and automatic floar. It can be fitted with pumps: Rule / Jabsco / 360 / 800 / 1000 GPH, Attwood V625 / V750 / V900, Europump 16.813.60, TMC 600GPH / 500GPH / 1000GPH, Seaworld 750GPH and floats Rule 35 / 35F, Attwood 4202, Seawoorld 40812.