The part ID 47-555-2070 refers to a generic, universal 5.5kW, 10-inch flow-thru heater element, which is a common replacement part compatible with many spa control systems, especially those using Balboa's M7 dual sensor technology.
This element is widely used in the hot tub industry by numerous spa brands because it fits standard 2-inch diameter heater manifolds from major control system manufacturers like Balboa, HydroQuip, and Gecko.
Here is an extensive list of spa manufacturers known to incorporate the heater assemblies that this element fits:
Aquaterra Spas
Artesian Spas
Balboa Water Group (The manufacturer of the M7 system this element replaces)
Beachcomber (on certain control boards)
Brett Aqualine
Bullfrog Spas (on certain control boards)
Cal Spas
Caldera Spas
Catalina Spas
Clearwater Spas
Coast Spas
Coleman Spas
Dimension One Spas
Dream Maker Spas
Dynasty Spas
Emerald Spas
Four Winds Spas
Freeflow Spas
Gecko Alliance (Compatible systems)
Great Lakes Spas
Hydro Quip (A primary manufacturer associated with this generic SKU)
Jacuzzi (specific models)
Life Smart Spas
Marquis Spas
Master Spas
Nordic Hot Tubs
Platinum Spas
QCA Spas
Signature Spas
Strong Spas
Sundance Spas
Superior Spas
Thermo Spas
Viking Spas
Vita Spas
Watkins Manufacturing (brands like Hot Spring, Caldera, Freeflow, Fantasy, etc.)
Wellis (certain models)
The versatility of this part means it is essentially a universal replacement for most modern "flo-thru" hot tub heaters that accept a 10-inch element
