Hot Spring Spas 1500w Heater - with pressure switch

Hot Spring Spas 1500w circulation heater replacement kit for replacement of current models 2003+ with internal pressure switch cord

Has
2 x temperature sensor locations - hi limit and control. (with 2 sets of connectors) 
1 x pressure switch built into the heater 
3/4" barbs for tubing connection 
Short section of 3/4" tubing and 1/4" tubing

*Its extremely important that you ensure water has flooded the heater and is flowing through the plumbing (primed) after installation and after every drain/refill. 
Failure of the heater due to 'Dry Running' will likely result if the heater has not properly primed. 
This is not a manufacturing defect and therefore not a warranty covered failure. 

This heater is for replacement of heater models with a second small wire with internal pressure switch
It can also be used to replace units without the pressure switch