The McAlpine ARW10 Rubber Washer is a spare part used for the bottle trap cup in plumbing systems. It is a small, circular rubber washer designed to fit around the rim of the bottle trap cup, which is used to prevent sewer gases from escaping into the home or building. The McAlpine ARW10 Rubber Washer is made from high-quality rubber material, which makes it durable and resistant to wear and tear. It is designed to provide a tight seal between the bottle trap cup and the waste pipe, ensuring that no water or gases leak out. When installing the McAlpine ARW10 Rubber Washer, it is important to ensure that it is properly aligned and seated around the rim of the bottle trap cup. This will ensure a secure and watertight seal, which is crucial for preventing leaks and ensuring the proper functioning of the plumbing system. Overall, the McAlpine ARW10 Rubber Washer is a reliable and essential component of any plumbing system that uses a bottle trap cup. It is easy to install and provides long-lasting protection against leaks and other plumbing issues. ・ Available for A10, C10 and E10 Bottle Traps