Waterway Plastics 672-4350 Barb Adapter - 0.25 inch MPT to 3/8 inch Barb

What This Part Is Used For
The Waterway Plastics 672-4350 barb adapter is used to connect small-diameter flexible tubing to threaded ports in pool and spa systems. It is commonly found in air lines, ozone systems, injectors, and other low-flow plumbing circuits.

Why This Part Matters
These smaller plumbing connections are critical to system performance but often overlooked during repairs. A mismatched or loose adapter can introduce air leaks, reduce injector efficiency, or cause intermittent system faults. Using the correct barb-to-thread adapter ensures a tight seal and reliable operation over time.

Key Features and Specifications

• Manufacturer part number 672-4350
• 0.25 inch male pipe thread inlet
• 3/8 inch barb outlet
• Used in air, ozone, and auxiliary water lines
• Compact form factor for tight equipment areas
• Common in pool and spa control and injector systems

Installation and Fitment Guidance
This adapter is typically threaded into a port and paired with flexible tubing secured by a clamp. It is often used in ozone or air-assisted systems where precise connections are critical. Confirm by manufacturer part number before ordering.

About the Waterway Plastics Brand
Waterway Plastics components are widely used across modern pool and spa equipment platforms. Their fittings are known for consistent thread tolerances and reliable sealing in real service environments. Professionals rely on Waterway for parts that fit correctly the first time.

Search and Compatibility Notes
Also searched as a Waterway barb to MPT adapter or 3 8 inch hose to 1 4 inch threaded fitting. Commonly referenced in ozone and air line repairs.