3/4 inch PEX Brass Insert Adapter PEX x Female

3/4 Inch PEX Brass Insert Adapter – PEX x Female NPT, Lead-Free

This 3/4 inch PEX brass insert adapter provides a secure transition between PEX tubing and a female threaded pipe connection. Designed for use in potable water and hydronic distribution systems, it features a PEX barb on one end and a female NPT thread on the other. The fitting is compatible with ASTM F1807/F877 crimp or clamp connection methods and complies with national lead-free requirements for drinking water applications.

Material and Compliance

Constructed from lead-free brass (typically meeting UNS C69300 or equivalent), this adapter is certified under NSF/ANSI 61 and 372 for potable water applications. It is pressure-rated and corrosion-resistant, making it suitable for continuous use in high-demand plumbing environments. Key compliance and performance characteristics include:

• ✅ Lead-Free Brass – Meets Safe Drinking Water Act requirements and is certified for use in potable systems nationwide.
• ✅ PEX Barb End – Machined to ASTM F1807 specifications for reliable sealing with crimp or cinch ring systems.
• ✅ Female NPT Threads – Conforms to ASME B1.20.1 threading standards for metal-to-metal connections with proper sealant.
• ✅ Temperature/Pressure Rating – Rated for up to 200°F and 200 psi, depending on system design.

Technical Specifications

• Material: Lead-Free Brass (NSF 61/372 compliant)
• Connection Type: 3/4 inch PEX x 3/4 inch FNPT
• Connection Standard: ASTM F1807 (barb), ASME B1.20.1 (thread)
• Application: Potable water and hydronic heating systems

Installation Requirements

PEX side must be connected using an approved crimp or cinch method per local code and system specification. Threaded end should be installed using PTFE tape or thread sealant formulated for brass connections. Avoid overtightening to prevent cracking or distortion. Always pressure-test the system after installation to confirm sealing integrity at all joints.

Common Applications

This fitting is used in residential and commercial plumbing systems to transition from flexible PEX piping to fixed female-threaded components such as valves, tees, or manifolds. Typical use cases include water heater connections, branch line transitions, and manifold terminations in new construction or retrofit scenarios.

Industry Note

Brass insert fittings are preferred in PEX systems for their strength, thermal resistance, and dimensional consistency. The lead-free brass formulation used in modern fittings supports compliance with IPC, UPC, and state-level plumbing codes for potable water safety.