1/2 inch PEX Brass Insert Adapter Crimp x Male

46321 Viega BRS PEX Adapter – 1/2 inch Crimp x 1/2 inch M NPT, Lead-Free Brass

The 46321 Viega BRS PEX Adapter is a transition fitting used to connect 1/2 inch PEX tubing to 1/2 inch male-threaded fittings in potable water distribution systems. Featuring a crimp-style PEX connection and a male NPT thread, this adapter provides a mechanically secure and code-compliant solution for joining cross-linked polyethylene piping to threaded system components.

Manufactured from lead-free brass, this fitting complies with NSF/ANSI 61 and 372 requirements for use in potable water applications. The body is machined to tight tolerances to ensure consistent sealing and compatibility with standard PEX crimp rings and installation tools.

Technical Specifications

• Material: Lead-Free Brass
• Nominal Size: 1/2 inch Crimp PEX x 1/2 inch Male NPT
• Connection Type: ASTM F1807 PEX (Crimp) x ANSI/ASME B1.20.1 Male Thread
• Standards: NSF/ANSI 61, NSF/ANSI 372, ASTM F1807 compliant
• Application: Potable water, residential distribution systems, retrofits, and remodels

Product Features

• ✅ Lead-Free Construction – Safe for use in drinking water systems in accordance with the Safe Drinking Water Act.
• ✅ Crimp Connection – Compatible with ASTM F1807 copper crimp rings for reliable sealing in PEX systems.
• ✅ Precision Machining – Threads and barbs are machined to ensure proper engagement with both PEX tubing and threaded fittings.
• ✅ Corrosion Resistant – Suitable for long-term service in indoor and concealed locations.

Installation Guidelines

Use with ASTM F1807-approved crimp rings and appropriate crimp tools. The male NPT thread should be sealed with approved thread sealant or PTFE tape before installation into a female-threaded fitting. Over-tightening should be avoided to prevent thread deformation or stress cracking.

Common Applications

Typically installed in residential water supply systems to transition from PEX to valves, fixtures, or manifolds with threaded inlets or outlets. Commonly used in slab rough-ins, wall stub-outs, and remodeling projects where PEX distribution is integrated into legacy copper or brass assemblies.

Material and Compliance

All Viega lead-free brass fittings, including this model, comply with low-lead legislation and performance requirements across all 50 U.S. states. The material formulation meets the safety standards applicable to components intended for use in drinking water systems.

The 46321 Viega BRS PEX Adapter offers a robust and reliable solution for professional-grade PEX-to-thread transitions. Its compliance with national plumbing codes and proven performance in potable systems make it a dependable choice for new installations and system upgrades.