Marco Tank Kits. Tank kit complete with self-priming gear pump, integrated check valve and electronic pressure sensor: to be used as automatic pump for boats, trucks, camper, etc. Nickel-plated brass body, PTFE gears, stainless-steel shaft and lip seal. There are numerous fields of applications for the pump, however only exclusively with the allowed liquids mentioned. Main use as automatic pump for freshwater and sanitary water systems on boats, camper.