Flo Thru Heater 4.0KW 2"x15" PS/SI Brett/Caldera Spa Components # B24040S Caldera Spas/ Brett System Stainless steel replacement heater assembly. 2" x 15" with 2" x 1-1/2" tailpieces. There are no mounting studs on this assembly, and the pressure switch hole is on the same side as the thermowell grooves. Rated at 4.0kW/240v
