1/4 inch x 1/8 inch Brass Compression Reducing Adapter Lead-Free OD x Male

1/4 inch OD x 1/8 inch MPT Lead-Free Brass Compression Reducing Adapter – Built for Reliable Transitions

The 1/4 inch OD x 1/8 inch MPT Lead-Free Brass Compression Reducing Adapter is designed for secure connections between copper tubing and threaded fittings in compressed air, water, or inert gas applications. Constructed from durable lead-free brass, it complies with federal and state low-lead requirements for potable water systems.

Engineered for field performance, this adapter allows for a smooth reduction between a 1/4 inch outer-diameter compression connection and a 1/8 inch male pipe thread, offering a corrosion-resistant, mechanically stable joint suitable for new installations or repairs in confined mechanical assemblies.

Functional Attributes

• ✅ Lead-Free Brass Construction – Compliant with NSF/ANSI 372 for safe use in potable water systems and public plumbing infrastructure.
• ✅ Compression-to-MPT Transition – Facilitates conversion between copper tubing and male-threaded components in small-diameter piping systems.
• ✅ Machined Sealing Surfaces – Minimizes leak potential under standard installation torque with proper sealant or ferrule engagement.
• ✅ Corrosion Resistance – Ideal for use in non-aggressive fluid environments where brass offers reliable longevity.

Specifications

• Tube Size: 1/4 inch OD (Compression)
• Thread Size: 1/8 inch MPT (NPT Tapered Male Pipe Thread)
• Material: Forged or machined lead-free brass
• Standards: Complies with NSF/ANSI 61 and 372; conforms to lead content limits under SDWA

Installation Considerations

For optimal sealing, use PTFE thread sealant on the MPT end. The compression end requires a properly sized ferrule and nut, tightened to manufacturer-recommended torque. This fitting is intended for use with rigid copper tubing and should not be used on soft plastic lines without inserts. Ensure proper alignment during assembly to avoid stress fractures or leakage.

Application Scenarios

Typically used in residential and light commercial potable water supply lines, control instrumentation circuits, and compact valve manifolds where a change from tube to pipe connection is required. Its small profile makes it particularly effective in panel installations and confined utility spaces.

Regulatory Note

As of the federal Reduction of Lead in Drinking Water Act (effective January 2014), use of lead-free brass fittings is required in all systems conveying water for human consumption. This adapter meets those requirements for both new and retrofit installations.