Therm [Cal Spas] 16.25" 4.0kW Flo-Thru Incoloy Heater (26-0165-5S-K) poolcovers 3 inch hole size

3 inch hole size

and similar hardware

no longer returns properly

and this Darlly 4CH-15 cartridge is designed for compatible spa and pool applications where the original cartridge has become loaded

This replacement is especially useful during service work when damaged covering needs to be renewed or when a connection needs extra sealing support

Therm [Cal Spas] 16.25" 4.0kW Flo-Thru Incoloy Heater (26-0165-5S-K) poolcovers 3 inch hole sizeTherm [Cal Spas] 16. 25" 4. 0kW Flo Thru Incoloy Heater (26 0165 5S K) provides a targeted heating solution for Cal Spas, combining the specified output and construction needed to restore consistent water heating without relying on a generic substitute. Its 4. 0kW heating output and 16. 25" heater length should be matched to the original equipment requirements before installation, since spa heaters are not universally interchangeable. A heater