AquaLock 3538-10 3-Way Selector Valve 1/2 in. CTS Push-to-Connect

The AquaLock 3538-10 is a 1/2-inch CTS plastic 3-way selector valve from Watts' 35 Series AquaLock push-to-connect line. Designed for reliable flow direction control in RV, marine, and residential plumbing systems, this valve is compatible with copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing — making it one of the most versatile selector valves available.

Key Features:

• Push-to-connect design — no tools or tube inserts required for installation
• Unique O-ring guide provides a zero-leak connection
• Joins tubing on the outside for increased flow capacity vs. barb fittings
• Tubing swivels after connection, even under maximum pressure — ideal for vibrating or dynamic applications
• Suitable for both hot and cold water lines
• Three 1/2 in. female quick-connect CTS ports (all three sides)
• 35 Series manifold stacking valve design
• Constructed from polysulfone — a high-performance thermal plastic

This valve is also sold under the SeaTech brand name, which Watts has rebranded as Watts AquaLock. Part numbers, sizes, and specifications remain unchanged across both brands. Alternate part numbers: 003538-10, 013538-10.