AquaLock 81902941 35-Series 1/2" CTS Stackable Elbow Quick-Connect Fitting

The AquaLock 81902941 is a 35-Series Stackable Elbow quick-connect plumbing fitting designed for 1/2" CTS (Copper Tube Size) connections. Manufactured from durable off-white polysulfone with an EPDM O-ring, this push-to-connect elbow delivers a reliable, zero-leak 90° change in direction without the need for any tools or tube inserts.

Key Features:

• Connection Size: 1/2" CTS (Copper Tube Size) on both ends
• Pressure/Temperature Rating: 180°F @ 100 PSI / 75°F @ 250 PSI
• Material: Off-white polysulfone with EPDM O-ring
• Tool-free installation — no tube inserts required
• Stackable design for versatile plumbing configurations
• Compatible with copper, CPVC, PEX, LDPE, MDPE, HDPE, and polybutylene tubing
• Suitable for both hot and cold water applications
• Joins tubing on the outside for increased flow capacity versus barb fittings

Certifications & Standards:

• NSF-61 and NSF-14 certified
• CSA B137.5 and ASTM F877 compliant
• IGC 188-04C listed
• Recognized by the Uniform Plumbing Code (UPC)

Also sold under the SeaTech brand (now rebranded to Watts AquaLock); part numbers and specifications remain identical. The 81902941 is an ideal solution for marine, RV, and residential plumbing applications requiring a compact, reliable elbow connection.