This is a original Watkins factory replacement heater element, not a generic model.
Removing the Low Flow Heater:
- Disconnect Power to the spa and access the equipment/pump compartment
- Access the control box.
- Disconnect the heater and pressure switch connector wires from the terminals.
- Disconnect the copper bonding wire attached to the side of the heater or control box. (if necessary).
- Unscrew the heater at the base from the floor of the equipment compartment.
- If the spa is undrained, clamp inlet and outlet hose 6 inches from the heater inlet and outlet barb fittingswith hose clamps.
- Slide the hose retaining clamps back towards the hose clamps allowing enought room to pull the hoses from the heater barbbed fittings.
- Remove the pressure switch and attached to new heater.
Installation:
- Install the new blower in the reverse order of removal
- Note: Allow a loop of wire between the control box and the power terminals. This is
called a service loop, and will allow for the use of an amp clamp in future troubleshooting. - After installation check for leaks and switch the jet pump to high speed and check spa functions.
74912 Heater Replacement 4kw is for the following models:
| Make | Model | Date Range |
| Caldera | Tahitian | 2016-Current |
| Caldera | Niagara | 2016-Current |
| Caldera | Geneva | 2016-Current |
| Caldera | Cantabria | 2016-Current |