A true-union swing check valve helps support one-way water movement in a compatible plumbing system, and this Flo Control valve is designed with 2 inch slip connections using the 1720C20 reference. When a check valve no longer seals or moves as intended, the plumbing system can lose dependable directional flow control.The 2 inch size, swing-check design, and true-union construction give this valve practical value because the right replacement should match the original pipe size and also support easier access for future service. A properly selected valve helps restore intended backflow prevention and contributes to cleaner plumbing performance.This type of part is especially useful when a valve may need periodic inspection or replacement without extensive replumbing. That makes the union configuration a useful maintenance benefit.Installed in the proper setup, this swing check valve helps restore dependable one-way flow control and contributes to better overall system reliability. True-union swing check valve with 2 inch slip connections Helps restore dependable one-way flow control Union design supports easier removal and servicing Useful when original valves are worn or unreliable Improves plumbing performance and maintenance efficiency