The McAlpine SE10V 75mm Water Seal Tubular Swivel Anti-Syphon (Silentrap) 'P' Trap with Universal Outlet is a plumbing fitting made by McAlpine that is commonly used in plumbing systems for sinks and basins. The "Water Seal Tubular" designation refers to the type of trap, which is a U-shaped pipe that prevents sewer gases from entering the building. The "Swivel" designation indicates that the trap can be rotated or adjusted to fit different installation requirements. The "Anti-Syphon (Silentrap)" designation indicates that the trap has a built-in device that prevents water from being siphoned out of the trap, which can cause sewer gases to enter the building and can also lead to unpleasant noises. The "'P' Trap" designation refers to the shape of the trap, which resembles the letter P. The "Universal Outlet" designation indicates that the trap has a versatile outlet that can be used with a variety of pipe materials, including copper, lead, and PVC. Overall, the McAlpine SE10V 75mm Water Seal Tubular Swivel Anti-Syphon (Silentrap) 'P' Trap with Universal Outlet is a specific plumbing fitting that is commonly used in sink and basin installations where preventing sewer gases and unpleasant noises is important. Its swivel design allows for easy installation and its universal outlet makes it versatile for use with different types of pipes. ・ Available in 1¼", 1½", and 2" sizes ・ 75mm Water Seal ・ Universal Compression Outlet suits all plastic, copper and lead pipe ・ Anti-Syphon Valve neutralises negative syphonic pressure and eliminates gurgling ・ Manufactured in polypropylene