The Caldera Heater (C3473-1) is a Watkins-manufactured 4.0KW, 240V low-flow trombone heater built for Caldera Spas systems, featuring a dual-element design with an attached pigtail cord and pressure switch connection.

Specifications:

• OEM part number: C3473-1
• Manufacturer: Watkins (for Caldera Spas)
• Power rating: 4.0KW
• Voltage: 240V
• Design: Low-flow trombone heater, 26" x 6", dual element
• Includes: 24" pigtail cord and off-angle box with 3/4" barb, plus pressure switch cord

Fits/replaces:

• Caldera Spas systems using the C3473-1 low-flow trombone heater
• Direct OEM replacement for part C3473-1

Common signs you need this part:

• Spa water is not heating or heating inconsistently
• Heater flow or hi-limit fault codes on the control panel
• Visible corrosion, leaking, or scale buildup on the existing heater element

Returns & installation: Please confirm your spa's heater assembly matches this part number and design before ordering. Installation should be performed by a qualified spa technician with power and water disconnected.

FAQ

Q: What size is this heater?
A: This heater measures approximately 26 inches by 6 inches and includes a 24-inch pigtail cord.

Q: Does this include the pressure switch?
A: Yes, this heater includes a pressure switch cord as described.