Camco RV 3" Waste Valve is a replacement waste valve for your RV black water system. Includes gaskets and installation hardware. Installation hardware is (4) 1/4"-20 x 1-3/4" bolts and (4) 1/4"-20 nuts. Replace a broken or worn waste valve 3" Replacement waste valve Easy to install Installation hardware included Designed for your RV's black water system