AquaLock 3585-18 1-Inch CTS Plastic Manifold Return End Push-to-Connect Fitting

The AquaLock 3585-18 is a 1-inch CTS plastic manifold return end fitting designed for use in Watts AquaLock / SeaTech 35 Series push-to-connect plumbing manifold systems. Built from high-performance polysulfone thermoplastic, this fitting delivers fast, secure, tool-free connections that are engineered for long-term, zero-leak reliability.

The collet features stainless steel gripping teeth that lock onto the tubing without requiring special tools or tube inserts, and a zero-leak patented O-ring guide protects the EPDM O-ring from damage during installation, aligns the tubing with the O-ring every time, and prevents it from becoming dislodged. Once installed, the fitting rotates freely under pressure, providing exceptional flexibility during and after installation.

Key Features:

• 1-inch CTS push-to-connect manifold return end for 35 Series systems
• Tool-free installation and removal with stainless steel gripping teeth collets
• Compatible with copper, CPVC, PEX, and CTS-rated pipe
• Zero-leak patented O-ring guide with EPDM O-ring seal
• Rotates under pressure for flexible, easy routing after installation
• No pipe stiffeners required for copper and CPVC — full unrestricted flow
• Lead-free polysulfone body construction
• Rated up to 250 PSI at 75°F (17.25 bar at 24°C)
• Suitable for hot and cold water applications, including behind-wall installations
• 25-year limited warranty

Certifications & Standards:

• NSF/ANSI 61 — Potable water safety
• NSF/ANSI 372 — Lead-free compliance
• NSF-14
• CSA B137.5
• ASTM F877
• Recognized by the Uniform Plumbing Code (UPC)
• Compliant with California, Vermont, Maryland, and Louisiana lead-free laws and the U.S. Safe Drinking Water Act

The AquaLock 3585-18 is an ideal solution for residential and commercial plumbing manifold installations where reliable, code-compliant, tool-free connections are required. Backed by a 25-year limited warranty for worry-free performance.

Specifications: UPC: 098268346589 | Ordering Code: 0959296 | Tube Insertion Depth (1" CTS): 1-1/4" (32mm) | O-Ring Material: EPDM | Body: Polysulfone | Collet: Nylon | Spacer: Acetal