1 in. PEX-A x 1 in. NPT Male Adapter (NSF Lead Free Brass F1960 PEX Cold Expansion Fitting)

The 247Garden 1-inch PEX-A x 1-inch NPT Male Adapter is a premium plumbing fitting designed to connect 1-inch PEX-A tubing to any standard 1-inch female threaded outlet. Constructed from lead-free, dezincification-resistant (DZR) brass, this adapter is NSF certified for potable water use and meets ASTM F1960 standards for cold expansion PEX systems.

This adapter provides a reliable transition between flexible PEX-A piping and threaded fixtures, manifolds, or valves. It is ideal for residential and commercial water distribution, as well as hydronic heating applications. The combination of PEX-A cold expansion and durable brass threads ensures a secure, leak-resistant connection that is efficient and long-lasting.

Key Features

• Size: 1 in. PEX-A x 1 in. NPT Male Adapter

• Material: Lead-Free DZR Brass, NSF certified for potable water

• Connection Types:

  • PEX-A side: Cold expansion with expansion rings or sleeves and expander tool

  • Threaded side: 1 in. NPT male, connects to standard female-threaded outlets

• Larger internal diameter provides up to 25% greater flow compared to crimp-style systems

• Rated up to 200°F and 200 PSI

• Meets or exceeds ASTM F1960, UPC, IPC, and cUPC standards

• Resistant to corrosion and dezincification

• Compatible with potable water systems and hydronic heating installations

Installation Instructions

Step 1: Threaded Side

1. Apply PTFE (Teflon) tape or approved thread sealant to the male NPT threads.

2. Hand-thread the adapter into the female threaded outlet.

3. Tighten securely with a wrench without overtightening to prevent damage.

Step 2: PEX-A Side

1. Cut the 1-inch PEX-A pipe squarely with a PEX cutter, ensuring a smooth, burr-free end.

2. Slide a 1-inch PEX expansion ring over the pipe.

3. Use a PEX expansion tool to expand the pipe and ring, rotating slightly for uniform expansion.

4. Immediately insert the fitting’s barb into the expanded tubing until fully seated.

5. Hold briefly as the PEX-A contracts naturally, forming a tight, leak-free seal.

Tips and Tricks for Best Results

• Always use a cold-expansion tool compatible with ASTM F1960; crimp or clamp tools are not compatible.

• Apply thread sealant or Teflon tape properly for a leak-proof NPT connection.

• Do not dry fit the PEX-A side—always expand before inserting the fitting.

• Allow the PEX-A tubing to fully contract over the barb for a secure connection.

• Keep both fitting and tubing clean; dirt or debris can compromise the seal.

• Pressure test the system after installation to ensure all connections are secure.

• Avoid overtightening threaded connections to prevent cracking or damage.

Why This Adapter is Useful

• Provides a durable, code-compliant transition between PEX-A piping and threaded outlets.

• Saves installation time compared to soldered copper or CPVC connections.

• Compatible with both potable water distribution and hydronic heating systems.

• Larger internal diameter delivers higher flow efficiency, supporting robust water delivery.

• Ideal for both simple and complex plumbing systems, offering professional-grade reliability.