The McAlpine WM15 is a high-quality plumbing component designed as a "P trap" for domestic appliances like washing machines or dishwashers. It features an adjustable inlet and a 75mm water seal to prevent the escape of foul odors and gases. The trap has a 1½" multifit outlet compatible with standard plumbing pipes and a 135° swivel inlet for flexible installation. P traps create a water barrier in the pipe bend to block backflow of gases and odors into buildings. This component offers reliable, long-lasting performance in domestic plumbing.