The McAlpine TSG2WH is a type of trapped gully commonly used in plumbing installations. It features a 75mm water seal to prevent foul odors and gases from escaping through the drain system, and a clamp ring and cover plate that provide a secure and tight seal. The trapped gully has a 110mm or 2" vertical solvent spigot outlet, making it compatible with standard plumbing installations. Its white cover plate gives it a clean and modern look that blends well with most bathroom or kitchen decors. Overall, the McAlpine TSG2WH is a reliable and efficient solution for drainage systems, providing protection against unwanted odors and gases.