Watts 3552-0808 Straight Stop Quick Connect Valve, 1/2 X 3/8 In.

The Watts 3552-0808 Straight Stop Quick Connect Valve is a push-fit in-line shut-off valve designed for fast, tool-free connections in plumbing installations and repairs. This valve connects 1/2-inch female iron pipe (FIP) to 3/8-inch copper tube size (CTS) tubing, making it ideal for retrofitting or new construction projects involving PEX, copper, or CPVC pipes. The quick-connect design eliminates the need for tools, sealant, or complex assembly, allowing you to cut the pipe and simply push the tubing into the fitting until it seats at the stop.

The valve features a durable polysulfone thermoplastic body with an O-ring guide that provides zero-leak connections and resists corrosion and thermal stress. It is code-approved for behind-wall installations without access and for direct in-ground burial, and meets NSF-14, NSF-61, CSA/ASTM, and UPC standards. The reusable design makes it an excellent replacement for Qest and Flare It type fittings and is suitable for both hot and cold water applications.

Features and Benefits

• Tool-Free Installation: Quick-connect design requires no tools, thread sealant, or tube inserts; simply cut and push for a secure connection.
• Zero-Leak O-Ring Guide: The unique O-ring design ensures a reliable seal, ideal for DIY pipe repairs and professional installations.
• High-Performance Material: Polysulfone thermoplastic body resists corrosion and thermal stress, delivering years of trouble-free service.
• Rated for 250 PSI: Engineered to handle demanding water pressures.
• Multiple Pipe Compatibility: Works seamlessly with PEX (LDPE, MDPE, HDPE), copper, and CPVC tubing.
• Code-Approved: Meets NSF-14, NSF-61, CSA/ASTM, and UPC standards for behind-wall and in-ground burial applications.
• Reusable and Versatile: Functions in both hot and cold water applications and works as a replacement for Qest and Flare It type fittings.

Specifications

• Brand: Watts
• Model: 3552-0808
• Connection Size: 1/2 in. Female Iron Pipe x 3/8 in. Copper Tube Size (CTS)
• Body Material: Polysulfone Thermoplastic, lead-free
• Pressure Rating: 250 PSI at 75°F
• Valve Type: Straight stop in-line valve
• Compatible Tubing: PEX (LDPE, MDPE, HDPE), copper, CPVC
• Standards: NSF-14, NSF-61, CSA/ASTM, UPC
• Applications: Behind-wall installations without access, direct in-ground burial, hot and cold water supply