Therm [Leisure Bay] 17.5" 4.0kW Flo-Thru Incoloy Heater (26-1001-5S-K) harwil while the scalloped gray finish

while the scalloped gray finish adds visual definition without being overly bold

These components are critical to how the heater moves water

The Waterway 3722021-1D Executive pump is designed for compatible applications and features a 5

Helps seal compatible connection points against leakage

A focused replacement like this is especially useful when the rest of the pump assembly remains serviceable and the weak point is isolated to the impeller itself

Therm [Leisure Bay] 17.5" 4.0kW Flo-Thru Incoloy Heater (26-1001-5S-K) harwil while the scalloped gray finishTherm [Leisure Bay] 17. 5" 4. 0kW Flo Thru Incoloy Heater (26 1001 5S K) is a replacement heater developed around the fit and operating requirements of Leisure Bay, making it a practical choice when the original heater assembly must be matched carefully. Its 4. 0kW heating output and 17. 5" heater length should be matched to the original equipment requirements before installation, since spa heaters are not universally interchangeable. When a spa