3/4 inch PEX Brass Insert Adapter Crimp x Female

46344 Viega BRS PEX Adapter – 3/4 inch Crimp x 3/4 inch Female NPT, Lead-Free Brass

The 46344 Viega BRS PEX Adapter is a transition fitting used for connecting 3/4 inch PEX tubing to 3/4 inch female-threaded components in potable water and hydronic systems. Featuring a crimp PEX connection on one end and a female NPT thread on the other, it provides a durable, code-compliant method for joining PEX systems to brass, copper, or iron threaded components.

Manufactured from lead-free brass, this fitting is suitable for use in drinking water systems and complies with federal low-lead regulations. The fitting conforms to ASTM and NSF/ANSI standards for pressure and performance in residential and light commercial plumbing systems.

Technical Specifications

• Size: 3/4 inch PEX x 3/4 inch FNPT
• Material: Lead-Free Brass
• PEX End: ASTM F1807 Crimp Connection
• Threaded End: ANSI/ASME B1.20.1 Female National Pipe Thread (FNPT)
• Certifications: NSF/ANSI 61, NSF/ANSI 372, ASTM F1807 Compliant

Key Features

• ✅ Lead-Free Brass Body – Certified for potable water use across all U.S. jurisdictions.
• ✅ PEX Crimp Compatibility – Designed for use with ASTM F1807 copper crimp rings and standard crimp tools.
• ✅ Threaded Female End – Accepts male-threaded pipe and fittings in domestic water systems.
• ✅ Corrosion Resistance – Provides long-term reliability in potable water and hydronic heating systems.

Installation Guidelines

Install using an ASTM F1807-approved crimp ring and tool for the PEX side. Use approved thread sealant or PTFE tape on the male NPT mating threads. Do not over-torque during installation. Ensure all components are free of debris and properly aligned to maintain sealing performance and meet code requirements.

Common Applications

This adapter is typically used in potable water distribution systems to transition from PEX tubing to threaded valve inlets, manifold connections, or brass fittings. It is suitable for new construction, repiping, and retrofits in residential and multi-unit buildings.

Code Compliance Note

All potable water fittings installed in the U.S. must be lead-free in accordance with the Reduction of Lead in Drinking Water Act. This fitting is fully compliant and marked accordingly for inspection and code review.

The 46344 Viega BRS PEX Adapter is a standard component for professional-grade PEX installations requiring a secure threaded connection. Its precision-machined brass construction and dual-end compatibility offer efficient, reliable integration into modern plumbing systems.