High velocity water jet pulls sewage from the RV sewer pipe and ejects it out the discharge hose. Liquefies waste and tissue. Pumps up to 8 gallons per minute. No installation necessary. Just twist onto your RV sewer pipe in place of the cap. Requires min. 15 psi water pressure through standard garden hose. Includes fiberglass-reinforced ABS pump unit, 10' dump hose, garden hose quick connect with backflow preventer and adapter for connection to 3" and 4" dia. sewer pipes or 1" PVC pipe. Universal design fits vertical or horizontal sewer outlets. Patented. USA.