Watts Water Technologies

Watts AquaLock Large Diameter Stop Valve

Professional push-to-connect shut-off valve for large diameter tubing across copper, PEX, CPVC, and polyethylene systems

Universal Compatibility Tool-Free Installation High Flow Capacity

WHY IT WORKS

Push-to-connect reliability for large diameter applications

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Universal Tube Compatibility

Connects directly to copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing without adapters or specialized tools

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Instant Connection

AquaLock push-to-connect design creates a secure, leak-free seal in seconds without soldering, gluing, or crimping

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High Flow Design

Large diameter valve body supports high-volume applications from 3/8" OD up to 1-1/8" OD tubing sizes

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Service-Ready Shutoff

Quarter-turn ball valve provides positive shutoff for filter changes, equipment maintenance, or emergency isolation

COMPATIBILITY

Size reference for proper fitting selection

The Watts AquaLock stop valve connects to polypropylene, copper, PEX, CPVC, and polyethylene tubing. Match your tubing size: 3/8" OD polypropylene works with 1/4" CTS copper, 1/2" OD with 3/8" CTS, 5/8" OD with 1/2" CTS, 7/8" OD with 3/4" CTS, and 1-1/8" OD with 1" CTS. For NPT threaded connections, actual outside diameters are 0.540" for 1/4" NPT, 0.675" for 3/8" NPT, 0.840" for 1/2" NPT, 1.050" for 3/4" NPT, 1.315" for 1" NPT, 1.660" for 1-1/4" NPT, 1.900" for 1-1/2" NPT, and 2.375" for 2" NPT. CTS refers to copper tube size, NPT to national pipe tapered thread standard.

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No Special Tools

Install in seconds without crimpers, soldering equipment, or thread sealant

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Leak-Free Seal

Internal O-ring and grip ring design ensures reliable performance under pressure

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Reusable Connection

Release collar allows disconnection and reconnection for system modifications

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Watts Quality

Engineered by Watts Water Technologies for commercial and residential plumbing standards

Watts AquaLock - Large Diameter Stop Valve / Shut Off Valve