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" |
