LF Brass Compression Coupling with Stop for CTS HDPE Pipe – AWWA C800 | NSF 61/372 Certified | 300 PSI Rated Water Service Fitting

Copper Tube Size LF Brass Compression Coupling with Stop – Secure, Watertight Connections for CTS & HDPE Pipes

Built for reliable underground service line connections, the LF Brass Compression Coupling with Stop is engineered to provide a secure, watertight seal for both copper tube size (CTS) pipes and high-density polyethylene (HDPE). Featuring a built-in stop, this coupling prevents the pipe from passing through, making installation faster and more precise.

Whether you're working with ¾" or 1" CTS service lines or adapting to flexible HDPE, this coupling is designed for strength and reliability. The easy-to-use compression connection system ensures strong pull-out resistance and a lasting seal—rated for up to 300 PSI. Made from lead-free (LF) brass and compliant with AWWA C800, NSF/ANSI 61, and NSF/ANSI 372 standards, it's a trusted solution for potable water systems.

Key Features: Built to Withstand the Pressure

• CTS & HDPE Compatible:
  Ideal for ¾" and 1" CTS copper tube and HDPE pipe (with insert stiffeners).

• Built-in Stop Design:
  Prevents over-insertion for a more accurate, secure connection.

• Quick & Simple Installation:
  Stab-fit design with compression nut tightens to create a watertight, pull-out resistant seal.

• Electrical Continuity Spring (for Copper):
  Maintains electrical conductivity when used with copper tubing; disengaged when used with HDPE.

• Heavy-Duty Construction:
  Made of lead-free brass, delivering long-term durability and corrosion resistance.

• Certified & Rated:
  Meets or exceeds AWWA C800, NSF 61 & 372; rated to 300 PSI operating pressure.

Reliable Compression, Every Time

For clean, dependable connections in municipal and residential water service lines, the Copper Tube Size LF Brass Compression Coupling with Stop is the professional’s go-to. When you're working with CTS sized HDPE pipe, this coupling ensures quick installations and secure sealing—even in demanding environments.

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.