3/8 inch x 1/2 inch PEX Brass Insert Adapter Crimp x Closet Adapter

3/8 inch x 1/2 inch Lead-Free Brass PEX Adapter – Transition Fitting for PEX to Straight Pipe Connections

The 3/8 inch x 1/2 inch Lead-Free Brass PEX Adapter is a precision-machined fitting designed for transitions between PEX tubing and iron pipe size (IPS) threaded components. Manufactured from lead-free brass, it is suitable for potable water systems and meets current regulatory requirements under the Safe Drinking Water Act (SDWA).

This adapter features a PEX crimp/barb connection on one end and a male or female straight-thread outlet on the other, enabling integration into supply lines, fixture drops, and manifold outlets where dissimilar connection types are required.

Product Features and Engineering Benefits

• ✅ Lead-Free Brass Construction Certified for potable water use in accordance with NSF/ANSI 61 and 372.
• ✅ PEX Crimp End Compatible with ASTM F1807 and F877 PEX tubing and crimp ring systems.
• ✅ Threaded Transition End Available in male or female NPT variants depending on model.
• ✅ Compact Profile Allows installation in confined spaces such as behind fixtures or in cabinet drops.
• ✅ Pressure Rating: Typically rated for up to 200 PSI at 73°F (verify per manufacturer specifications).

Technical Specifications

• Size: 3/8 inch PEX x 1/2 inch NPT (nominal dimensions)
• Material: Dezincification-resistant lead-free brass
• Connection Standard: PEX end complies with ASTM F1807 / Threaded end conforms to ANSI B1.20.1
• Application: Potable water, hot/cold supply lines, fixture connections

Installation Requirements

Install using industry-standard crimp tools with copper crimp rings or stainless steel clamp bands. Ensure proper alignment of tubing within the barb fitting and verify full engagement before crimping. For threaded connections, apply PTFE tape or thread sealant as appropriate. Always pressure test system after installation per code.

Application Overview

This adapter is used in residential and light commercial plumbing systems for fixture risers, manifold distribution, point-of-use connections, and system retrofits. Particularly useful when transitioning from PEX to threaded valves, stops, or supply risers in tight installations.

Regulatory Compliance

Compliant with low-lead plumbing laws in all U.S. jurisdictions. Approved for use in potable water systems and certified to applicable plumbing standards for lead-free brass transition fittings.