John Guest Black Union Conn, 3/4" CTS

The John Guest Black Union Connector, 3/4" CTS, from Reliance Worldwide Corporation joins two 3/4" CTS pipes inline as part of the UV-resistant black PEI Twist and Lock range. Developed for the most common water filtration and water treatment applications, including point-of-entry filter housings and water conditioning, it is equally at home in plumbing repair, remodel, marine, and RV work.

This union coupling restores or extends a 3/4" CTS line without solder, glue, or crimping, which makes it a fast, clean way to repair a run or tie in new pipe. Manufactured from high-quality engineered PEI plastic with EPDM O-rings, it forms a leak-free connection that holds up across a broad range of temperatures and conditions. The Speedfit push-in system assembles in seconds with no tools and is fully demountable when reconfiguration is required.

Features of the Union Connector

• Push-fit connections for tool-free, time-saving assembly
• Suitable for use with PEX, CPVC, and copper pipe
• Rated for hot and cold water and hydronic heating
• Lead-free and non-toxic
• Truly demountable without damage to pipe or fitting
• Corrosion-free with no scale build-up and no risk of fire or flames

The UV-resistant black body makes this union well suited to exposed installations in basements, garages, and outdoor settings where standard fittings could degrade over time. Because no torch is needed, there is no fire risk during installation, an important consideration when working near finished walls or flammable materials. To install, cut the pipe square, deburr both ends, then push each 3/4" CTS pipe fully into the union until it bottoms out. The push-in system grips and seals automatically; a gentle tug confirms each connection. Should you need to take the joint apart for servicing or reconfiguration, the demountable design lets you do so without damage and refit in seconds. For dependable, versatile point-of-entry water treatment plumbing, this John Guest black union connector is built to perform.

As part of the JG Twist and Lock range, this union connector coordinates with the matching black elbows and male adapters that share the same engineered PEI design, so a complete point-of-entry layout can be assembled from one consistent family of fittings. The combination of fast, torch-free installation and compatibility with PEX, CPVC, and copper makes the range especially well suited to retrofits and filter or softener hookups.