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A bilge pump will be used to empty this tank but it can not discharge the contents directly overboard due to the potentially harmful oils and chemicals which may be in the fluids. The bilge pump must feed the tank contents directly to an oily water separator where the contents are filtered through a coalescer measuring the contents of the fluid which must be below a certain PPM before being discharged overboard. Such bilge pumps should ideally have dry run protection if a positive displacement t...