3/8 inch x 1/4 inch PEX Brass Lav Insert Adapter Crimp x Compression

VIEGA BRS PEX Lav Adapter – Crimp x CTS 3/8 inch x 1/4 inch (OD) Lead-Free Brass Connector

The VIEGA BRS PEX Lav Adapter is a precision-machined fitting used to transition from 3/8 inch PEX tubing to a 1/4 inch compression (CTS) connection. This lead-free brass adapter is intended for use in potable water systems and is approved for use in both residential and commercial installations.

Designed to facilitate secure terminations in tight configurations, this fitting simplifies the connection between flexible PEX piping and copper tubing-sized outlets at lavatory fixtures. Its robust brass body offers durability, corrosion resistance, and long-term mechanical reliability under typical service conditions.

Technical Features

• ✅ Lead-Free Brass Construction – Meets ANSI/NSF 61 and 372 standards for use in potable water systems across all U.S. jurisdictions.
• ✅ Connection Type – Crimp-style PEX x 1/4 inch CTS (3/8 inch OD) compression termination for fixture supply line compatibility.
• ✅ System Integrity – Designed for consistent sealing performance when installed with ASTM F1807 or F2159 compliant crimp rings.
• ✅ Compact Configuration – Ideal for under-sink, wall-cavity, or other restricted-space connections where minimal clearance is available.
• ✅ Corrosion Resistant – Brass alloy resists dezincification and maintains strength in chemically treated municipal water supplies.

Specifications

• Material: Lead-Free Brass
• PEX Connection Size: 3/8 inch (ASTM F1807 crimp-compatible)
• CTS Outlet Size: 1/4 inch (3/8 inch OD compression)
• Connection Method: Crimp ring (tool required)
• Standards: NSF 61/372 certified, ASTM F1807 compliant

Use Cases

Primarily used in lavatory water supply applications where flexible PEX tubing must transition to standard fixture valves or braided supply connectors. Suitable for both new installations and service retrofits in confined areas behind cabinetry or wall-mounted vanities.

Installation Guidelines

Install using a calibrated crimp tool approved for ASTM F1807 brass fittings. Verify crimp ring placement and apply appropriate compression technique. For CTS side, ensure proper insertion depth and compression nut engagement with approved tubing or ferrules. Always pressure test the system after installation per local code requirements.

Code Compliance

Viega’s lead-free fittings meet national and local plumbing code mandates for potable systems, including the Reduction of Lead in Drinking Water Act. This ensures regulatory alignment for contractors working under IAPMO, IPC, and UPC jurisdictions.