Waterway Executive 4.0 SPL [12.4A] [2S] Pump (3421821-1U) modular The Waterway 660-3570 notched air

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

This replacement is especially helpful when the original button has aged poorly

The Raypak stack adapter is designed for compatible 266A and 267A heater applications where the supported vent transition component needs replacement

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 The Waterway 660-3570 notched airThe 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