In any proper hydraulic system on board a ship, pumps and fresh water pumps are the main components and must always be efficient. Also bilge pumps play an important role in the said system as they show the level of drain water inside the boat and let water be drained out of the bilge, the bottom area below the deck where liquids normally collect from the hull to be pumped out.The Osculati catalogue displays the main types of bilge pumps suitable for vessels of various dimensions. In this section, you can find submersible bilge pumps to drain standing water, some of them portable, and self-priming pumps. These, unlike submersible pumps that have to be submerged in a liquid to drain it out, start running thanks to the depression produced by the impellers, gears and diaphragms of the pump. Fresh water pumps are also very important for the proper working of an on board hydraulic system under any conditions. This is because the fresh water pump maintains the right pressure in the hydraulic system all the times. It consists of two couplings: an inlet coupling to draw water from the tank and a drain coupling to supply the system.Many models of automatic diaphragm fresh water pumps complete with accumulator tanks as well as high-flow rate fresh water pumps, quiet and easy-to-install, are available for you to choose on Osculati.com