Watts 3510-1012 Pex Quick Connect Female Adapter, 1/2 Cts X 3/4 Fpt

The Watts 3510-1012 is a quick-connect female adapter designed to join 1/2 inch copper tube size (CTS) tubing to 3/4 inch female pipe thread (NPS) connections. This single-piece fitting eliminates the need for tools, sealants, or tube inserts, making it ideal for new plumbing installations, repairs, and upgrades. The quick-connect design allows you to simply push tubing into the fitting until it seats, then disconnect by pulling back on the ring—no assembly required and no parts to lose.

Made from durable polysulfone, a high-performance thermal plastic material, this adapter is rated for 250 psi at 75 degrees Fahrenheit and 100 psi at 180 degrees Fahrenheit. It works with copper, CPVC, and PEX tubing (LDPE, MDPE, HDPE), making it versatile for residential plumbing, hot and cold water applications, and even behind-the-wall and direct in-ground burial installations. The unique O-ring guide provides a zero-leak connection, and the fitting rotates under pressure for flexibility during installation. Approved by NSF-14, NSF-61, CSA, ASTM, and IAPMO standards, it is code-approved and offers an excellent replacement for QEST and flare-it type fittings.

Features and Benefits

• Tool-Free Installation: Push-to-connect design requires no wrenches, thread sealant, or tube inserts—simply push tubing in and hand-tighten the swivel nut.
• Durable Construction: Made from polysulfone, a high-performance thermal plastic that resists corrosion and provides reliable, long-lasting service.
• Zero-Leak Design: The O-ring guide ensures dependable connections for critical water supply applications.
• Flexible and Reusable: Fitting rotates under pressure and can be disconnected and reused, saving time on repairs and modifications.
• Versatile Compatibility: Works with copper, CPVC, PEX (LDPE, MDPE, HDPE), and CTS-rated pipe for residential and commercial use.
• Code-Approved: Meets NSF-14, NSF-61, CSA B1375, ASTM F877, and IAPMO ASSE 1061-2006 standards for behind-wall and in-ground burial.

Specifications

• Brand: Watts
• Model: 3510-1012
• Size: 1/2 inch CTS x 3/4 inch NPS (female pipe thread)
• Material: Polysulfone
• Color: Off-white
• Pressure Rating: 250 psi at 75°F; 100 psi at 180°F
• Configuration: Female adapter connector, single piece
• Approvals: NSF-14, NSF-61, CSA, ASTM, IAPMO, FDA