Bullfrog 65-2020 Spa Heater 4 kW M7 Balboa with Sensors

Bullfrog Spa Heater 4.0 kw M7 includes the 2 built-in sensors. Includes 2x heater tailpieces and 2x gaskets.

This 2 inch diameter flow through hot tub heater is 15" long. 

This type of 4 kilowatt heater is used in Bullfrog spas and by other hot tub manufacturers that use either a plastic or metal Balboa spa pack.

This 4 kW, 15", 2" x 2" spa heater is unlike older systems that use pressure switches,since this heater has 2 built-in sensors which come with the heater.

Those sensors take the duties of hi limit and temperature sensing so no external pressure switch is needed with this type of control system.

This heater includes the 2 inch tailpieces and gaskets.

Need to connect to 1 1/2 inch plumbing?  See the reducing tailpieces 50084

(newer units may also include an extra cable that fits BP series spa packs as needed)