AquaLock 3540-10 CTS Union Check Valve Push-to-Connect Fitting

AquaLock

<h3>About AquaLock by Watts</h3><p>AquaLock, a brand under the Watts Water Technologies family, has built a strong reputation as a leading provider of push-to-connect fluid connection solutions for marine, RV, and residential plumbing applications. Originally introduced to the market as SeaTech — a brand serving boating manufacturers since 1995 — AquaLock carries forward decades of engineering expertise under a modern, unified identity. Whether you're outfitting a yacht, an RV water system, or a residential pressurized water line, AquaLock's push-to-connect technology delivers fast, reliable, and tool-free installations.</p><h3>Push-to-Connect Technology That Works</h3><p>At the heart of every AquaLock product is a commitment to simplifying fluid connections without sacrificing performance. Their fittings require no tools, soldering, glue, or crimping — a simple push locks the tubing in place, while a stainless steel gripper ring holds it firmly and resists corrosion. A locking clip adds an extra layer of security, and the fittings can even rotate under pressure, making installation and adjustment far more flexible than traditional plumbing methods.</p><p>One of AquaLock's most distinctive engineering features is the <strong>zero-leak patented O-ring guide</strong> found on their Plastic Series. This innovation protects the O-ring during connection, aligns the tubing correctly every time, and prevents the O-ring from becoming dislodged — a critical advantage for pressurized systems where a failed seal can mean costly damage or downtime.</p><p>AquaLock fittings and valves are certified to ANSI, NSF, and ASTM standards, making them suitable for potable water applications. The product line spans brass, mini, and plastic configurations and is available in both inch (Imperial) and metric formats to serve a global customer base.</p><h3>Trusted Across Marine, RV, and Residential Applications</h3><p>AquaLock is widely recognized as a top choice among boat builders and marine distributors worldwide. Their <a href="/200807-pressurized-water-system-tubing-fittings-aqualock-18054">pressurized water system tubing and fittings</a> are trusted for potable water lines, live well systems, fresh and raw water washdown, air-conditioning chilled water lines, drain lines, and windshield washing systems aboard vessels of all sizes. The same reliable technology translates seamlessly to RV water systems and residential plumbing, where DIYers and professional installers alike appreciate the speed and simplicity of push-to-connect design.</p><p>The full AquaLock lineup includes an extensive range of <a href="/200786-plumbing-parts-accessories-aqualock-18054">plumbing parts and accessories</a> — from elbows and tees to manifolds, adapters, and hose assemblies — as well as <a href="/200724-nylon-pipe-hose-fittings-aqualock-18054">nylon pipe and hose fittings</a> engineered for compatibility with copper, PEX, CPVC, LDPE, MDPE, HDPE, and polypropylene tubing. Their <a href="/200130-ball-valves-aqualock-18054">ball valves</a> provide precise flow control within these systems, and their <a href="/18054-aqualock-gaskets-seals-201268">gaskets and seals</a> — including the innovative O-ring guide system — ensure every connection remains watertight over years of service.</p><h3>Why Choose AquaLock?</h3><ul style="list-style:disc"><li><strong>Tool-free installation:</strong> Connect and disconnect quickly without special equipment</li><li><strong>Multi-material compatibility:</strong> Works with copper, PEX, CPVC, and various polyethylene tubings</li><li><strong>Certified quality:</strong> ANSI, NSF, and ASTM certified for potable water use</li><li><strong>Patented O-ring guide:</strong> Prevents seal damage and ensures a leak-free connection every time</li><li><strong>Imperial and metric sizing:</strong> Fits both domestic and international applications</li><li><strong>Marine-grade durability:</strong> Stainless steel gripper rings resist corrosion in demanding environments</li></ul>