No more guessing about what surprises may be lurking behind the waste valve cap. This clearview waste valve cap from Valterra allows you to easily see when your tank is full and needs to be cleaned. Made of super tough clear ABS plastic, the cap includes an attachment strap to prevent loss. Design lets you connect a standard garden hose to clean the tank without removing the cap or to allow gray water to drain. Measures 3" in diameter. Super tough ABS plastic construction 3/4" standard garden hose attachment | Clearview Waste Valve Cap with 3/4" Outlet in Grey