AquaLock 3517-10 1/2" CTS Push-to-Connect Union Elbow Fitting

The AquaLock 3517-10 is a 1/2" CTS (Copper Tube Size) x 1/2" CTS push-to-connect union elbow fitting designed for fast, tool-free plumbing connections. Manufactured from lead-free polysulfone, a high-performance thermoplastic, this 90-degree union elbow delivers long-lasting, reliable service in potable water systems.

Key Features:

• Quick push-to-connect design — no tools, tube inserts, or thread sealant required
• Compatible with copper, CPVC, PEX (LDPE, MDPE, HDPE), and CTS-rated pipe
• Suitable for both hot and cold water applications, including behind-the-wall installations
• Patented O-ring guide ensures a zero-leak connection by protecting the O-ring and properly aligning tubing
• Joins tubing on the outside (unlike barb fittings), increasing flow capacity
• Rotates under pressure for high flexibility during installation
• Reusable — connects and disconnects without tools
• Off-white lead-free polysulfone construction for corrosion resistance
• Ideal for vibrating and dynamic applications

The AquaLock 3517-10 union elbow is part of Watts Water Technologies' AquaLock 35 Series and works with 5/8" OD tubing. It reduces installation errors, speeds up plumbing work, and is well-suited for RV, marine, and residential potable water plumbing systems.