A true-union swing check valve helps maintain one-way flow in a compatible plumbing system while also allowing easier removal for service, and this Flo Control valve is designed with 1-1/2 inch slip connections using the 1720C15 reference. When a check valve becomes unreliable or difficult to access, plumbing performance and maintenance efficiency can both suffer.The 1-1/2 inch size, swing-check design, and true-union construction give this valve practical value because a properly matched replacement should fit the system size and support easier future service. A correctly selected valve helps restore intended directional flow control and contributes to cleaner plumbing performance.This type of part is especially useful when long-term serviceability matters in the plumbing layout. That makes the union-style design a practical advantage in addition to its flow-control role.Installed in the proper setup, this swing check valve helps restore dependable one-way flow control and contributes to better overall plumbing reliability. True-union swing check valve with 1-1/2 inch slip connections Helps restore dependable one-way flow performance Union design supports easier service and removal Useful when original valves are worn or unreliable Improves plumbing reliability and maintenance convenience