The McAlpine Rubber Waste Washer RWW8 is a component used in plumbing systems to create a watertight seal between a waste outlet and the waste pipe. The washer is designed to fit around the waste outlet, providing a cushioning effect and preventing leaks by creating a tight seal between the outlet and the pipe. The RWW8 Rubber Waste Washer is made from high-quality rubber, which is flexible and durable, making it resistant to wear and tear, as well as exposure to water and other chemicals found in plumbing systems. The washer is designed to fit a waste outlet with a diameter of 77mm and a waste pipe with a diameter of 59mm. The thickness of the washer is 3.0mm. One of the key features of the McAlpine RWW8 Rubber Waste Washer is its ease of installation. The washer can be easily installed by a professional plumber or DIY homeowner with basic tools and some plumbing knowledge. The washer is simply placed around the waste outlet and pushed into the waste pipe, creating a tight seal between the two components. Overall, the McAlpine RWW8 Rubber Waste Washer is a reliable and effective component for creating a watertight seal between a waste outlet and waste pipe in plumbing systems. Its high-quality rubber construction, along with its ease of installation, make it a popular choice for both professionals and DIY homeowners.