LF Brass Compression by FPT Adapter Copper Tube Size – CTS & HDPE to Female Thread Connection | Lead-Free | 300 PSI | AWWA C800 & NSF 61/372 Certified

Copper Tube Size LF Brass Compression by FPT Adapter – Reliable Brass Connection for CTS Piping

Securely adapt your copper or HDPE piping to standard threaded plumbing systems with the Copper Tube Size LF Brass Compression by FPT Adapter. Designed for versatility and strength, this fitting connects CTS copper or high-density polyethylene (HDPE) pipe to plumbing components with male pipe threads (MPT), making it ideal for both residential and commercial water service line transitions.

Engineered for ¾" and 1" CTS pipe—the most commonly used sizes for service lines—this adapter offers a simple, tool-free compression install and a lead-free brass body for durability and potable water safety. Insert stiffeners are required for flexible HDPE pipe connections to ensure a secure, long-lasting fit.

Key Features: Effortless Adaptation, Long-Lasting Performance

• Lead-Free Brass Construction:
  Certified safe for potable water applications and designed for long service life.

• Compression-to-Female Pipe Thread Adapter:
  Quickly and securely connects CTS copper or HDPE pipe to any MPT fitting.

• CTS Compatibility:
  Works with standard ¾" and 1" copper tube size pipe or HDPE.

• Insert Stiffeners Required for HDPE:
  Maintains pipe integrity and ensures a watertight seal.

• Tool-Free Installation:
  Simply stab the pipe into the compression end, tighten the H-nut, and you’re done.

• Code & Industry Compliant:
  Meets or exceeds AWWA C800 and NSF/ANSI 61 & 372 standards.
  Rated for 300 PSI working pressure.

A Secure Solution for CTS to FPT Transitions

Whether you're upgrading your water service lines or adapting to new plumbing infrastructure, the LF Brass Compression by FPT Adapter ensures a secure and certified connection. With its easy install design and lead-free brass body, it's a go-to choice for contractors and municipalities alike.

CTS Brass Compression Fittings Size Guide

CTS (Copper Tube Size) brass compression fittings are designed for use with plastic (HDPE) or copper tubing that follows the Copper Tube Size standard. This system refers to the nominal size of the tubing, but the actual outside diameter (OD) is larger than the nominal value. These fittings are commonly used in residential plumbing, potable water systems, and radiant heating applications.

All compressions ends of CTS fittings connect to tubing based on its outside diameter, which is a measurement also shared with copper pipes. Be sure to measure the OD of your pipe or tubing to ensure compatibility. Always measure the outside diameter of your pipe to select the proper size.

Tip: CTS compression fittings are not interchangeable with IPS fittings or pipe. If you're using HDPE or CPVC pipe, verify that it follows CTS sizing and confirm the OD before purchasing.