The Zodiac and Jandy NeverLube 3-port diverter valve is designed for compatible plumbing systems where water needs to be managed between multiple connected lines. A 3-port diverter valve is useful because it gives the system more flexible routing capability while preserving a clean, centralized control point.This replacement is especially useful when the original valve is leaking, sticking, worn internally, or no longer directing flow as intended. The NeverLube construction adds appeal for installations where reduced maintenance and smoother long-term operation are priorities.The 4719 is a practical service choice when a compatible system needs a 3-port diverter valve to restore cleaner routing and more dependable plumbing performance. Zodiac and Jandy NeverLube 3-port diverter valve Designed for compatible multi-path flow control applications Helps restore dependable routing between ports Useful when the original valve is worn or difficult to operate Supports lower-maintenance plumbing control