Restore reliable heating performance to your spa with the Balboa C3473-1 Low Flow Trombone Heater Assembly. Designed as a replacement for select Caldera and Watkins hot tubs, this 240V, 4.0kW heater features a low flow trombone style design that delivers efficient heat transfer while working with circulation pump systems.

The complete heater assembly includes an internal pressure switch, dual heating element, off angle terminal box, and durable 3/4 inch barb connections for dependable operation. It is commonly used in select Caldera Paradise and Utopia series spas as well as other Watkins Wellness models requiring a low flow heater assembly.

Built for long lasting performance, the C3473-1 is an ideal OEM style replacement for worn or failed spa heaters, helping restore proper water temperature and dependable spa operation.

• OEM style replacement heater assembly
• 4.0 kW heating capacity
• Operates on 230/240V systems
• Low flow trombone (U-bend) heater design
• Internal pressure switch for added safety
• Dual heating element construction
• 3/4" barb plumbing connections
• Includes pigtail power cord and pressure switch wiring
• Compatible with select Caldera and Watkins spas