Flo-Thru spa heater replacement B24040U is a generic 15"", 4.0 kW, 240V, used on Gecko Pro MSPA spa packs. Flow Thru spa heater by Spa Components, B24040U, labeled as Heater Current Collector Assembly, includes Incoloy coated heater element, unions not included.
B24040U replaces 4 kW heaters used with Gecko M-SPA controls, replacing OEM 9920-100338. 15"" x 2"" stainless steel tube, includes 2"" unions and matches Gecko M-Series spa pack mounts. Refer to the measurements in the image for proper heater selection.
Our Hot Tub Heater Assemblies are US made and carry a 2-year Warranty. Please contact us if you need any help selecting the correct hot tub heater to match your spa control.