Watts AquaLock - Large Diameter Stackable Valve

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line-height: 1.6 !important; } .ro-wrap h2 { font-size: clamp(26px,4vw,40px) !important; line-height:1.15 !important; } .ro-wrap h3 { font-size: 20px !important; line-height:1.3 !important; } .ro-wrap h4 { font-size: 18px !important; line-height:1.3 !important; } .ro-wrap .ro-label, .ro-wrap .stage-tag, .ro-wrap .sc-label { font-size: 14px !important; } .ro-wrap .ro-title { font-size: 24px !important; } .ro-wrap .interval { font-size: 22px !important; } .ro-wrap .stage-num { font-size: 16px !important; } .ro-wrap .ro-eyebrow { font-size: 14px !important; } .ro-wrap .ro-badge { font-size: 15px !important; } Watts Water Watts AquaLock Large Diameter Stackable Valve Push-to-connect fitting compatible with copper, CPVC, PEX, and polyethylene tubing systems Tool-Free Installation Multi-Material Compatible Stackable Design The Watts AquaLock stackable valve uses push-to-connect technology to join multiple tubing types without tools, solvents, or crimping. Designed for large diameter applications, this fitting simplifies plumbing installations across residential and light commercial water systems. COMPATIBILITY Tubing & Thread Standards AquaLock fittings connect to copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing. Polypropylene tubing sizes range from 3/8" OD (1/4" CTS) to 1-1/8" OD (1" CTS). National Pipe Thread (NPT) sizes span 1/4" through 2" NPT with corresponding outside diameters from 0.540" to 2.375". CTS refers to Copper Tube Size, NPT to National Pipe Tapered threads, and NPS to National Pipe Straight threads. The stackable design allows multiple connections in confined spaces without complex manifold assemblies. SPECIFICATIONS Sizing Reference Polypropylene OD Copper Tube Size (CTS) 3/8" 1/4" 1/2" 3/8" 5/8" 1/2" 7/8" 3/4" 1-1/8" 1" NPT Thread Sizing Actual OD (Inches) NPT Thread Size 0.540 1/4" 0.675 3/8" 0.840 1/2" 1.050 3/4" 1.315 1" 1.660 1-1/4" 1.900 1-1/2" 2.375 2" Show more