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

Viega BRS PEX Adapter – 3/8 inch Crimp x 1/2 inch FNPT, Lead-Free Brass

The Viega BRS PEX Adapter (3/8 inch Crimp x 1/2 inch FNPT) provides a reliable transition between ASTM F1807 PEX tubing and female-threaded iron pipe systems. Manufactured from lead-free brass, it is designed for use in potable water systems and complies with current U.S. lead content regulations (SDWA Section 1417).

This fitting is part of Viega’s crimp connection system, compatible with standard PEX crimp tools and copper crimp rings. The precision-machined barbed end ensures a secure mechanical grip within PEX tubing, while the FNPT outlet offers universal compatibility with threaded metal fittings in supply manifolds, valves, or fixtures.

Performance Features

• ✅ Connection Type: ASTM F1807 crimp (3/8 inch) x ANSI/ASME B1.20.1 FNPT (1/2 inch)
• ✅ Material: Dezincification-resistant, lead-free brass (meets NSF/ANSI 61 & 372)
• ✅ Temperature/Pressure Rating: 200 PSI at 200°F (when installed per PEX system specifications)
• ✅ Precision Machining: Tight tolerances on barbed end and thread form for reliable fit and seal
• ✅ Code Compliance: UPC, IPC, NSF-61, NSF-14, and CSA B137.5 listed

Installation Guidelines

Install using ASTM F1807-compliant crimp rings and tools. Confirm full barbed insertion depth before crimping, and verify crimp integrity with a go/no-go gauge. Apply thread sealant or PTFE tape to male threads before connection to FNPT side. Not for use with fuel gas or in systems exceeding rated pressure/temperature limits.

Application Scope

Commonly used in residential and light commercial systems, this adapter is suited for transitioning between PEX tubing and threaded supply valves, manifolds, and other fixtures. It is widely specified in domestic cold and hot water distribution systems, remodels, and repiping projects.

Regulatory Note

All potable water fittings sold and installed in the U.S. must be lead-free under the Safe Drinking Water Act. This Viega adapter meets those requirements and is certified accordingly, making it suitable for code-compliant installations across all jurisdictions.

The Viega 3/8 inch x 1/2 inch PEX Adapter supports durable and compliant installations in crimp-style PEX systems where a secure threaded transition is required. Designed for mechanical reliability and long-term service life.