Part number 229-8130 is a white version of the Waterway Poly Storm Gunite Twin Roto jet internal.
It features a 3-3/8 inch smooth face and utilizes a thread-in installation style with an adjustable on/off control.
This specific "Twin Roto" jet provides a dual rotating water stream for a circular massage pattern. It is widely used by many of the same manufacturers that utilize the Waterway Poly Storm line, including:
Cal Spas: Frequently uses Waterway Poly Storm internals as standard equipment.
Artesian Spas: A primary manufacturer of spas using the Waterway Poly Storm threaded jet series.
Dynasty Spas: Incorporates various Waterway Storm series jets, including the Poly Storm threaded models.
Viking Spas: Features the Poly Storm thread-in series in their portable spa lineups.
Sundance Spas: Uses Waterway Poly Storm series jets as primary or compatible replacement components.
Marquis Spas: Utilizes high-flow Waterway massage internals, including the Twin Roto variants.
Custom Concrete (Gunite) Spas: This is an industry-standard jet for custom in-ground concrete hot tubs where the "Gunite" style internal threads into a permanent wall-mounted body.
