Waterway Executive 4.0 SPL [12.4A] [2S] Pump (3421821-1U) modular 0 horsepower rating places it

0 horsepower rating places it in a strong performance class for supported applications

The Waterway 660-3570 notched air control is designed for compatible spa systems that use a 1 inch air control assembly with a 1-5/8 inch hole size and a 2-3/4 inch face diameter

1-1/2 inch slip connection

Gate valves are useful because they allow plumbing sections to be isolated without disassembling surrounding equipment

and this Balboa Freedom Series version is designed for compatible 1/2 inch by 1 inch offset applications where the original body has worn down

Waterway Executive 4.0 SPL [12.4A] [2S] Pump (3421821-1U) modular 0 horsepower rating places itThe 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