The Waterway 400-4200 union tee assembly is designed for compatible plumbing applications and includes a 1-1/2 inch union nut with a 1 inch slip by 1 inch slip tee. A part like this is useful where a serviceable union connection also needs an integrated tee branch, combining accessibility and distribution in one compact assembly.That combination can simplify plumbing layouts that would otherwise require multiple separate fittings around a union point. This Waterway assembly is especially practical where future service access and a tee-style branch are both important to the system design.For compatible plumbing repairs and installation work, this Waterway union tee assembly is a practical option when a removable union connection with an integrated 1 inch tee is needed. Waterway union tee assembly Includes 1-1/2 inch union nut with 1 inch slip x 1 inch slip tee Useful for combining service access and branch distribution Helps simplify more complex plumbing layouts Supports cleaner and more efficient installation