General description The McAlpine WM15 is a high-quality plumbing component known as a "P trap," specifically designed for use with domestic appliances like washing machines and dishwashers. It features an adjustable inlet and a 75mm water seal that effectively prevents the escape of foul odors and gases from the drainage system. The trap is equipped with a 135° swivel inlet connection, allowing for flexible installation in various orientations to meet specific requirements. Technical specifications Type: P trap Water seal: 75mm Outlet size: 1½" multifit Inlet connection: 135° swivel Usage P traps are essential in plumbing systems as they create a barrier of water that prevents gases and odors from entering a building from the drainage system. The trap functions by retaining a small amount of water in the bend of the pipe, which forms a seal against backflow.