Clean Dump easily and securely connects to most RV dump receptacles, preventing accidental spillage. The patented pump technology used by Clean Dump pressurizes the 1? diameter discharge hose, so that it is cleaned by the grey water which is discharged last. Just close the valve at the discharge end and slide the hose and valve handle back into the storage compartment and you are done. RV sewer storage has never been easier! No need to rinse! Save Water! RV parks love the Clean Dump!