Watts AquaLock - Large Diameter Union Check Valve
Watts AquaLock Check Valve Core Specs
Polypropylene Tubing Compatibility
| 3/8" OD Polypropylene | 1/4" CTS Copper Tube Size (ID) |
| 1/2" OD Polypropylene | 3/8" CTS Copper Tube Size (ID) |
| 5/8" OD Polypropylene | 1/2" CTS Copper Tube Size (ID) |
| 7/8" OD Polypropylene | 3/4" CTS Copper Tube Size (ID) |
| 1-1/8" OD Polypropylene | 1" CTS Copper Tube Size (ID) |
NPT Thread Sizing Guide
| 0.540" OD Actual | 1/4" NPT Thread Size |
| 0.675" OD Actual | 3/8" NPT Thread Size |
| 0.840" OD Actual | 1/2" NPT Thread Size |
| 1.050" OD Actual | 3/4" NPT Thread Size |
| 1.315" OD Actual | 1" NPT Thread Size |
| 1.660" OD Actual | 1-1/4" NPT Thread Size |
| 1.900" OD Actual | 1-1/2" NPT Thread Size |
Tubing and Connection Options
The Watts AquaLock Large Diameter Union Check Valve connects seamlessly to copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing systems. The union design allows for tool-free installation and maintenance access in reverse osmosis systems, water filtration lines, and residential plumbing applications where backflow prevention is required. CTS sizing references Copper Tube Size based on inside diameter, while NPT refers to National Pipe Tapered thread standards for male or female threaded connections. This check valve is designed for integration with SeaTech and other push-to-connect fitting systems commonly used in point-of-use water treatment.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Watts AquaLock Check Valve Core Specs
Polypropylene Tubing Compatibility
| 3/8" OD Polypropylene | 1/4" CTS Copper Tube Size (ID) |
| 1/2" OD Polypropylene | 3/8" CTS Copper Tube Size (ID) |
| 5/8" OD Polypropylene | 1/2" CTS Copper Tube Size (ID) |
| 7/8" OD Polypropylene | 3/4" CTS Copper Tube Size (ID) |
| 1-1/8" OD Polypropylene | 1" CTS Copper Tube Size (ID) |
NPT Thread Sizing Guide
| 0.540" OD Actual | 1/4" NPT Thread Size |
| 0.675" OD Actual | 3/8" NPT Thread Size |
| 0.840" OD Actual | 1/2" NPT Thread Size |
| 1.050" OD Actual | 3/4" NPT Thread Size |
| 1.315" OD Actual | 1" NPT Thread Size |
| 1.660" OD Actual | 1-1/4" NPT Thread Size |
| 1.900" OD Actual | 1-1/2" NPT Thread Size |
Tubing and Connection Options
The Watts AquaLock Large Diameter Union Check Valve connects seamlessly to copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing systems. The union design allows for tool-free installation and maintenance access in reverse osmosis systems, water filtration lines, and residential plumbing applications where backflow prevention is required. CTS sizing references Copper Tube Size based on inside diameter, while NPT refers to National Pipe Tapered thread standards for male or female threaded connections. This check valve is designed for integration with SeaTech and other push-to-connect fitting systems commonly used in point-of-use water treatment.
