The Balboa 26-58001-K heater assembly is a 4.0kW, 230V flow-through spa heater used with select Balboa hot tub control systems. This replacement heater measures approximately 2.25″ x 15″ and includes a pressure switch and cover plate.
This heater is commonly referenced under Balboa part number 58001 and may replace or cross-reference several older heater numbers used in Leisure Bay and other Balboa-equipped spa systems.
ProTip: Replace both gaskets when replacing the heater.
Key Features
Balboa Water Group heater assembly
4.0kW heater output
230V operation
15″ heater length
Approx. 2.25″ heater tube size
Includes pressure switch
Includes cover plate
Used with select Balboa spa control systems
Common Part Number References
26-58001-K
58001
52108
54610
58003
9711-221
BB58001
Fitment Notes
This heater is intended for select Balboa-based spa control systems using a 4.0kW, 230V, 15″ flow-through heater assembly with pressure switch. Always compare the heater length, voltage, wattage, plumbing size, sensor/pressure switch setup, and electrical connections before ordering.
If you are replacing a discontinued Balboa heater, confirm your original part number and heater dimensions before installation. Some older spa systems may have multiple heater variations that look similar but are not wired or configured the same.
Installation Reminder
Heater replacement should be performed with power disconnected at the breaker. This is a 230V electrical component and should be installed by a qualified spa technician or electrician if you are not comfortable working with spa electrical systems.
Balboa 4.0kW Heater Frequently Asked Questions
Balboa heater 58001 commonly replaces older part numbers including 54610, 58003, 9711-221, BB58001, and some 52108 heater assemblies. Always verify dimensions and electrical specs before ordering.
The original Balboa 58001 heater has been listed as discontinued by some suppliers, but replacement heater assemblies such as 26-58001-K remain available through aftermarket and replacement channels.
This is a 230–240V spa heater rated at 4.0kW. It is not compatible with 120V spa systems.
This heater assembly is approximately 15 inches long with a heater tube diameter of about 2.25 inches.
Yes. This heater assembly includes a pressure switch and cover plate.
Common signs of a failed spa heater include no heat, tripping breakers, heater error codes, visible corrosion, burnt terminals, or a spa that circulates normally but never reaches temperature.
Sometimes yes, but many customers replace the complete heater assembly because it includes the tube, pressure switch, and hardware, reducing labor and eliminating additional failure points.
Fitment depends on your spa’s control system, heater length, voltage, plumbing connections, and pressure switch configuration. Compare your original heater label and dimensions before ordering.
Yes. If you are unsure, send us photos of your existing heater label, wiring, and plumbing connections. We can help verify compatibility before you order.
Reviews
There are no reviews yet.
Only logged in customers who have purchased this product may leave a review.
Reviews
There are no reviews yet.