Replacement heater for select Sundance and Jacuzzi hot tubs utilizing a 24-hour circulation pump system, this genuine OEM low-flow heater assembly delivers reliable heating power. Its robust trombone design with a square back is a specialized fit rather than a universal replacement.
Details:
- Brand: Hydroquip
- Length: 23″ x 12″ x 10″
- Heater Wattage: 4.0kW
- Heater Type: Low Flow
- Inlet Size/Outlet Size: 3/4″ Barb
- Voltage: 240V
Compatible replacement for:
- Sundance 6500-450
- Jacuzzi 6500-420
- Balboa 58388
Fits the following hot tubs:
- Jacuzzi J-325, 2016 – 2024 (120/230 volt convertible models)
- Jacuzzi J-315, 2016 – 2024, (120/230 volt convertible models)
- Sundance 780 Series Dover model, 04/2017 to present
Compatibility Alert: Designed exclusively for the spa models listed with a low-flow circulation, this heater utilizes 3/4-inch barbed connections. If your spa relies on a high-flow jet pump with 2-inch plumbing unions, this part will not fit. Always verify your current heater’s manual or stamped part number prior to purchase.
Returns:
- All replacement heater assemblies are shipped factory-new and fully tested.
- Final Sale: Because these are sensitive electrical components, heater assemblies cannot be resold once shipped and are non-returnable.
- Your purchase is fully covered by the original manufacturer’s warranty.









