3/8 inch x 1/4 inch Brass Compression Reducing Adapter OD x Male

3/8 inch OD x 1/4 inch MPT Brass Compression Reducing Adapter – Lead-Free, Machined for Performance

The 3/8 inch Outside Diameter x 1/4 inch Male Pipe Thread Compression Reducing Adapter from BrassCraft is engineered for transitioning between compression and threaded connections in potable water or fluid handling systems. Manufactured from lead-free brass, this fitting is compliant with current federal and state low-lead regulations and is ideal for professional-grade installations.

This adapter facilitates a secure connection between 3/8 inch OD copper, CPVC, or PEX tubing (with appropriate insert) and 1/4 inch MPT female threaded ports. Precision-machined threads and compression components ensure a reliable, leak-resistant seal in applications such as fixture supply lines, ice makers, and equipment hookups.

Product Advantages

• ✅ Lead-Free Brass – Certified to ANSI/NSF 61 and compliant with federal Safe Drinking Water Act standards
• ✅ Precision Threading – NPT threads meet ASME B1.20.1 for tight, consistent engagement
• ✅ Reliable Compression Seal – Machined ferrule seat ensures uniform pressure distribution during tightening
• ✅ Corrosion Resistance – Brass body resists dezincification and internal corrosion in potable water systems
• ✅ Application Flexibility – Suitable for use with copper, CPVC, or PEX when paired with appropriate inserts

Specifications

• Body Material: Lead-Free Brass (compliant with NSF/ANSI 372)
• Tube Size: 3/8 inch OD
• Thread Size: 1/4 inch MPT (Male Pipe Thread)
• Connection Type: Compression x Male NPT
• Operating Pressure: Up to 125 PSI (dependent on system)
• Operating Temperature: 40°F to 160°F

Common Applications

This reducing adapter is commonly used in fixture supply assemblies, including lavatories, toilets, dishwashers, and refrigerators. It is suitable for potable water lines, fluid transport, and compatible with standard residential and light commercial systems.

Installation Guidelines

Apply thread sealant or Teflon tape to the male pipe threads before assembly. For compression connections, use a calibrated wrench to tighten the nut securely while avoiding over-compression, which may distort the ferrule or damage tubing. Do not use on gas lines or in high-vibration environments without appropriate support or bracing.

Compliance and Safety

Lead-free brass fittings are mandated for potable water systems under the Reduction of Lead in Drinking Water Act (effective 2014). This adapter meets those regulatory standards, ensuring safety and legal compliance in all 50 U.S. states.

Choose the 3/8 inch OD x 1/4 inch MPT Lead-Free Brass Compression Adapter for professional-grade performance, precise sealing capability, and proven durability in the field. Built to industry specifications for reliable installation, this component is a staple in modern plumbing systems.