3/8 inch Brass Compression Adapter Lead-Free OD x Male

3/8 inch Compression Adapter – Brass, Lead-Free, MPT x OD Tube

The 3/8 inch Brass Compression Adapter is engineered for secure, corrosion-resistant connections in potable water, fuel, and hydraulic systems. Designed to join 3/8 inch outside diameter tubing to a 3/8 inch male pipe thread, this adapter provides a mechanical seal through a compression nut and sleeve, eliminating the need for soldering or adhesives.

Manufactured from lead-free brass, this fitting is suitable for applications where compliance with low-lead legislation (such as NSF/ANSI 61 and 372) is required. Its compact design and reliable performance make it a trusted component for professional-grade systems requiring tight, leak-resistant joints under pressure.

Key Performance Features

• ✅ Lead-Free Brass Construction – Meets national lead content requirements for potable water applications.
• ✅ Mechanical Seal – Compression joint forms a tight, reusable seal without the need for heat or sealant.
• ✅ Dual Connection Format – Transitions from copper, aluminum, or thermoplastic tubing to NPT-threaded pipe.
• ✅ Corrosion Resistant – Suitable for use in systems exposed to moisture or mild chemicals.

Technical Specifications

• Body Material: Lead-free brass (certified to NSF/ANSI 61 and 372)
• Connection: 3/8 inch OD Compression x 3/8 inch MPT (Male Pipe Thread)
• Working Pressure: Up to 200 psi (tubing-dependent)
• Temperature Rating: -65°F to 250°F (-53°C to 121°C)
• Application: Suitable for potable water, air, gas, and oil lines

Installation Notes

To install, ensure that the tubing is cut square and free of burrs. Insert the tube fully into the compression seat, then tighten the nut until resistance is met. Final tightening should be done with two wrenches to avoid damaging threads or distorting the ferrule. No thread sealant is required for the compression side; use thread tape or sealant on the male pipe thread if required by application code.

Common Applications

• Potable water service lines and fixture hookups
• Refrigeration and HVAC control lines
• Fuel oil and low-pressure gas connections (code permitting)
• Hydraulic and pneumatic instrument panels

Industry Insight

Compression fittings offer a consistent sealing method in environments where disassembly may be needed for maintenance or inspection. Their mechanical sealing properties make them ideal for soft metal and thermoplastic tubing under moderate pressure.

The 3/8 inch Brass Compression Adapter is a precision-machined, code-compliant fitting designed for performance in critical fluid and gas systems. When system reliability and material integrity matter, this fitting delivers dependable results for field installations and service work alike.