The Therm Products C2550-1054 heater assembly can be found in Acura Spas and Applied Computer Controls hot tub systems (but not limited to).
This heater has a thermowell sensor tap and a pressure switch tap (flow switch tap).
Sensor and pressure switch not included.
The Therm Products C2550-1054TI-1 (Titanium 5.5KW) flo-thru heater assembly has the following features and specifications.
Additional Therm Products Part Numbers: C2550-1054, C2550-1054-TI
Manifold Length: 15"
Manifold Diameter: 2"
Stainless Steel: Yes
Heating Element Included: Yes
Element Grade: Titanium
Kilowatt Rating: 5.5KW / 1.375KW
Voltage Rating: 240V / 120V
Mounting Studs: Yes
Number of Mounting Studs: 2
Temperature Sensor Included: No
Hi-Limit Sensor Included: No
Pressure Switch Included (A.K.A. Flow Switch): No
Number of Threaded Taps: 2
Threaded Tap Location(s): Pressure switch tap @ 12 O'Clock and sensor tap @ 12 O'Clock.
Tail Pieces Included: Yes (removable)
Tail Piece Size: 2" x 2" (removable)