Therm [Marquis Spas] 12" 4.0kW Flow-Thru Incoloy Heater (26-C2278-1-5S-K) topsides It is used for replacing

It is used for replacing a heater gas control component

Balboa genuine AX10A4 auxiliary topside

Supports cleaner direct replacement during service

Improves repair quality and sensing confidence

Verify part number GSRA1 before ordering

Therm [Marquis Spas] 12" 4.0kW Flow-Thru Incoloy Heater (26-C2278-1-5S-K) topsides It is used for replacingTherm [Marquis Spas] 12" 4. 0kW Flow Thru Incoloy Heater (26 C2278 1 5S K) is designed as a purpose focused replacement heater for Marquis Spas, where matching physical configuration and heating output is essential to dependable spa operation. Its 4. 0kW heating output and 12" heater length should be matched to the original equipment requirements before installation, since spa heaters are not universally interchangeable. In day to day spa operation, a