The Waterway 400-2000 pump union assembly is designed for compatible pump plumbing applications using a 1 inch slip by 1 inch slip configuration. A full union assembly in this style is useful because it restores a removable pump connection while keeping the surrounding plumbing in a straightforward rigid-line format.Slip-by-slip unions are especially practical where solvent-weld plumbing is already in place and future service access still matters. Replacing the assembly with the correct Waterway part helps preserve a cleaner installation and maintains easier pump removal later.For compatible pump repairs and plumbing replacement work, this Waterway union assembly is a practical choice when a 1 inch slip-to-slip serviceable connection is required. Waterway pump union assembly 1 inch slip x 1 inch slip configuration Useful for serviceable rigid pump plumbing connections Helps simplify maintenance and future equipment removal Supports cleaner and more dependable installation