Therm [Leisure Bay] 17.5" 4.0kW Flo-Thru Incoloy Heater (26-1001-5S-K) harwil or heavily weathered

or heavily weathered

Using the correct replacement can help restore the cleaning setup and reduce frustration during vacuuming service

A part like this is useful because it refreshes the visible jet face while preserving the more distinctive design identity of the Galaxy format

Helps seal compatible connection points against leakage

Supports a more complete and readable heater interface

Therm [Leisure Bay] 17.5" 4.0kW Flo-Thru Incoloy Heater (26-1001-5S-K) harwil or heavily weatheredTherm [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