1/2 inch x 3/8 inch Brass Compression Reducer Reducing Adapter Lead-Free Male x OD

3/8 inch OD x 1/2 inch MPT Lead-Free Brass Compression Reducer – Precision-Engineered for Pipe Size Adaptation

This 3/8 inch Outside Diameter x 1/2 inch Male Pipe Thread (MPT) brass compression reducer is engineered to connect dissimilar pipe sizes in fluid transfer and potable water systems. Constructed from lead-free brass, it conforms to federal and state regulations for drinking water applications and meets performance standards for both residential and commercial installations.

The reducer enables a secure transition from compression tubing to threaded pipe while maintaining seal integrity under system pressure. Manufactured to tight dimensional tolerances, this fitting ensures repeatable, leak-resistant performance in plumbing assemblies requiring reliable material compatibility and code compliance.

Performance and Material Highlights

• ✅ Lead-Free Brass – Meets NSF/ANSI 372 and other applicable low-lead requirements for potable water system use.
• ✅ Compression x MPT Configuration – Adapts 3/8 inch OD soft copper, PEX, or plastic tubing to 1/2 inch NPT male threaded connections.
• ✅ Corrosion-Resistant Body – Brass alloy provides long-term durability and resistance to dezincification in aggressive water conditions.
• ✅ Reliable Mechanical Seal – Compression nut and ferrule (sold separately) form a tight, vibration-resistant seal without soldering.
• ✅ Working Pressure Rating: Suitable for low- to moderate-pressure systems; verify pressure limits per manufacturer specs and system design.

Technical Specifications

• Material: Lead-Free Brass (Certified to NSF/ANSI 372)
• Size: 3/8 inch OD Tube x 1/2 inch MPT
• Connection Type: Compression (Tube) x Male Pipe Thread (NPT)
• Applications: Potable water systems, fixture connections, hydronic systems, and retrofits requiring dimensional adaptation
• Standards: Complies with ASTM and ASME dimensional and performance guidelines

Installation Notes

Proper installation requires use of a compatible compression nut and ferrule (typically brass or plastic depending on tubing type). Avoid overtightening the nut to preserve thread and tubing integrity. Always ensure the tubing is cut square, deburred, and fully seated into the fitting body before tightening. Use thread sealant tape or approved sealant on the MPT side for optimal sealing performance.

Common Applications

This compression reducer is often used in fixture rough-ins, water filtration system connections, appliance hookups, and retrofitting copper or PEX tubing into threaded pipe systems. It is suitable for systems operating within the pressure range specified by code and manufacturer recommendations.

Code Compliance Note

Lead-free brass fittings are mandated for use in potable water distribution systems under U.S. federal law and local plumbing codes. This product meets those requirements, ensuring project compliance and safety.

The 3/8 inch OD x 1/2 inch MPT Lead-Free Brass Compression Reducer provides a precise, corrosion-resistant solution for adapting tubing to threaded pipe. Engineered to meet code and deliver dependable performance across varied system layouts.