Just put it on the end of your current 50mm waste pipe and hook your sewer pipe to the opposite end. Helps prevent waste from leaking out of the drain valves . Equalize separate tanks for less draining. Temporary attachment for stuck open drain valve. Attaches to the end of your 50mm drain hose. The sewer pipe fits on the opposite end. Features: Just put it on the end of your current 50mm waste pipe and hook your sewer pipe to the opposite end. Prevents waste from escaping from the valves. equalize separate tanks for less draining. Temporary fixing for glued open drain plug. Attaches to the end of your 50mm drain hose. The sewer pipe fits on the opposite end. Features: Material: plastic. Color: black. Inner diameter: approx.50 mm. Dimensions: approximately 72 x 69 x 230 mm. Contents: 1 drain valve. Note: 1. Due to lighting and screen specific settings, the items color may vary slightly from the photos. 2. Since measurements are taken by hand, the dimensions indicated may vary from 0.5 to 2 cm.