Part number 600-8140 is a Waterway Plastics 1.5" Air Check Valve designed for air blower lines to prevent water from entering the blower.
As a highly common and standardized part, it is used by a wide variety of spa manufacturers who incorporate Waterway components into their systems.
These include, but are not limited to:
Hydropool: This manufacturer uses the check valve, cross-referencing it with their own part number 5065014.
Gecko Alliance: Although primarily a control systems manufacturer, the part is often used in conjunction with their packs and is also sold under the Gecko brand.
Balboa: Often found in systems using Balboa controls and components, which frequently interface with Waterway plumbing parts.
Jacuzzi / Sundance: The part is found in some models, where it is used as a generic 1.5" air line component in the plumbing.
Many others: This valve is a universal, off-the-shelf component from a major parts supplier (Waterway Plastics), and is therefore installed in countless brands of spas, bathtubs, and pools that use 1.5" slip plumbing for their air systems.
