Balboa 15" 4.0 kW 240V Spa Heater Assembly for Non-M7 systems that use a pressure switch. 

This 15", 240v, 4-kilowatt spa heater is a top of the line replacement for your spa heater used in older Beachcomber hot tubs and other brands that used the Balboa Digital 2000 series control pack.

Tube length is 15" and has 2" unions.

This heater does not include pressure switch.