The McAlpine MACVALVE-2 is a self-closing waste valve in white, designed for use with a 40mm fanny trap. This valve is made by the well-known brand McAlpine and is specifically designed for handling waste in plumbing systems. The 1 1/2" size makes it suitable for various applications where a self-closing waste valve is required, providing a reliable solution for managing waste in a plumbing system.