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Watts AquaLock Large Diameter Union Tee
Universal push-to-connect tee fitting for large diameter tubing connections in residential and commercial water systems
Engineered for quick, reliable connections across multiple tubing types
Tool-Free Installation
AquaLock push-to-connect technology creates secure connections in seconds without wrenches, clamps, or crimping tools
Universal Tubing Compatibility
Works with copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing for maximum installation flexibility
Large Diameter Design
Handles larger flow rates for whole-house filtration, commercial applications, and high-demand water systems
Watts Engineering
Proven SeaTech AquaLock design built to Watts quality standards for long-term leak-free performance
Tubing and thread specifications
The Watts AquaLock Large Diameter Union Tee accepts connections by copper tube size (CTS) and polypropylene OD sizing. Compatible with 3/8" OD (1/4" CTS), 1/2" OD (3/8" CTS), 5/8" OD (1/2" CTS), 7/8" OD (3/4" CTS), and 1-1/8" OD (1" CTS) tubing. Works seamlessly with reverse osmosis systems, filtration manifolds, water softener bypass lines, and commercial water treatment installations. Also compatible with NPT threaded connections from 1/4" through 2" National Pipe Thread standards.
Instant Connection
Push tubing in until it seats, connection is complete
Easy Release
Collet release mechanism allows quick disconnection for maintenance
Precise Sizing
Engineered dimensions ensure proper fit across CTS and OD standards
Professional Grade
Trusted by installers for residential and commercial projects
