Valterra Waste Slide Kit 3"There are unpleasant chores, even when RVing, and dumping your black water is one of those. This twist on gate valve will replace your old valve easily, making an unpleasant task a little more tolerable. The valve cover cap is securely attached to the unit, so no more lost caps which can be a problem with other, cheaper, models. A replacement valve may be the simple solution to stopping leakage when hooking up your RVs black water tank to the dump