Waterway Executive 4.0 SPL [12.4A] [2S] Pump (3421821-1U) skimmerparts or fails to engage properly

or fails to engage properly

Union fittings like these are useful because they make it easier to connect

or when the O-ring no longer seals correctly

This type of part is especially useful when replacing a worn cable or extending service reach without changing the broader control setup

Waterway Executive 4.0 SPL [12.4A] [2S] Pump (3421821-1U) skimmerparts or fails to engage properlyThe Waterway 3421821 1U Executive pump is designed for compatible applications and features a 4. 0 SPL motor rated at 12. 4 amps in a 2 speed configuration. A pump like this is useful because it restores the full operating assembly while keeping the flexibility of two speed functionality in systems built around Executive pump designs. Matching the correct SPL and speed configuration helps preserve system compatibility and makes a direct replacement