3711621-1V identifies a Waterway Viper 4 HP, single-speed, 56-frame, 230V spa pump with 2.5-inch intake and discharge.
While the exact list of every manufacturer is extensive, Waterway pumps are commonly used by a wide variety of spa manufacturers due to their versatility and design (the wet end can be rotated every 90 degrees). Manufacturers who are known to use Waterway pumps or compatible models in their spas include:
Jacuzzi / Jacuzzi Brothers: Uses Waterway pumps in various portable spa models.
Sundance Spas: Certain models incorporate Waterway filtration and pump components.
Artesian Spas: Uses Waterway Executive and Viper pumps in their lineup.
Marquis Spas: Incorporates Waterway components in many of their spas.
Coleman Spas: Utilizes Waterway pumps for certain jet functions.
Vita Spas: Some models use Waterway pumps for water flow.
Garden Leisure: Integrates these pumps in their spa systems.
Gulf Coast Spas: Uses similar 4HP and 5HP 56-frame 230-volt pumps.
Many other generic or private-label hot tubs: Due to the standardization of the 56-frame motor and 2.5" connections, this pump is widely used across the industry.
The pump is designed with a unique wet end for 56-frame motors, double-shielded ball bearings with moisture-resistant grease for quieter operation and long life, and is thermally protected.