e TSG1-WH 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 2″ horizontal outlet and a 2″ x 1½” socket reducer, making it compatible with standard plumbing installations. The white cover plate gives it a clean and modern look. Overall, the McAlpine TSG1-WH is a reliable and efficient solution for drainage systems, providing protection against unwanted odors and gases. Its design allows for easy installation and maintenance, making it a popular choice among plumbing professionals.