Marine Gulper Toilet Pump Mk2 - 12V. Virtually unblockable pumps - unmacerated toilet waste with ease. Pumps a mixture of air and waste, runs dry without damage. Pumps up to 18ltrs per minute. Rotatable inlet and outlet - allows you to install and maintain in awkward locations. Self priming up to 3m (9.8ft) - mount the pump in the most convenient part of the boat. Ideal for holding tanks and vacuum systems.