It is an automatic pump which operates on the basis of the priming principle. In hydraulics, it consists in the preliminary steps which are fundamental to guarantee the correct functioning of a suction pump, i.e. in filling the suction hose of the pump with the liquid that has to be poured.
Its self-priming pump draws in sea water treated with Raritan Concentrate (minimizes odors, lubricates working parts and helps keep bowl clean) while a macerator discharges waste.