1/2 inch PEX Ring with Stop

1/2" PEX Ring with Stop – Precision Support for Expansion Fittings

The 1/2" PEX Ring with Stop is an integral component of the Uponor ProPEX® expansion system, used to create secure connections between PEX-a tubing and engineered polymer (EP) or brass fittings. Designed specifically for use with ASTM F1960 expansion fittings, this ring maintains joint integrity through mechanical compression as the tubing contracts over the fitting.

Manufactured from high-density polyethylene (HDPE), this expansion ring offers consistent dimensional performance and uniform compression when installed with an expansion tool and proper insertion depth. The integrated stop feature ensures correct positioning during assembly, reducing the risk of improper alignment or incomplete insertions.

Key Technical Attributes

• ✅ Material Composition Engineered from durable HDPE for dimensional stability and cold-weather flexibility.
• ✅ Application Specificity Designed exclusively for use with PEX-a tubing and F1960 expansion fittings.
• ✅ Integrated Stop Built-in shoulder assists with accurate installation depth and repeatable joint placement.
• ✅ Standard Compliance Conforms to ASTM F1960 for cold-expansion connections in potable water and hydronic systems.
• ✅ Temperature and Pressure Rating Matches system design limits of Uponor PEX-a systems (typically up to 200°F and 160 psi depending on application).

Installation Considerations

Installation requires the use of an ASTM F1960 expansion tool and fitting system. Rings must be properly aligned with the tubing and installed immediately after expansion to ensure effective memory recovery. Expansion connections do not require crimping or clamping tools, reducing the risk of tool-induced deformation or misapplication.

Use Cases

Commonly used in residential and commercial potable water distribution and hydronic heating systems. Appropriate for new construction and retrofit installations requiring code-compliant expansion connections.

Product Insight

PEX-a systems utilizing expansion rings are valued for their high-strength, full-flow joints and reduced potential for leak paths when compared to insert-style or mechanically crimped alternatives. The ring’s elasticity provides continuous pressure on the fitting, supporting a strong, lasting seal without reliance on external fasteners.

The Uponor 1/2" PEX Ring with Stop offers reliability and precision for expansion fitting assemblies, supporting long-term system performance and adherence to plumbing codes. Suitable for contractors seeking consistent results in high-volume installations.