AquaLock Pressurized Water System Tubing & Fittings

AquaLock Push-to-Connect Fittings for Pressurized Water Systems

When it comes to pressurized water system tubing and fittings, AquaLock — a brand by Watts and the evolution of the legendary SeaTech line — has built a reputation as one of the most trusted names in the industry. With roots going back to 1995, the SeaTech heritage behind AquaLock has supplied boating manufacturers and beyond with fluid connection solutions designed for marine, RV, residential, and agricultural applications. That deep experience translates directly into the performance and reliability that installers and DIYers alike depend on in pressurized water systems.

Tool-Free Installation Without Compromise

What sets AquaLock apart in the Pressurized Water System Tubing & Fittings category is its signature push-to-connect technology. No tools are required — simply connect and disconnect for easy, flexible installation — while an integrated locking clip provides extra connection security. Just push the tubing into the fitting until it stops for a secure, leak-free connection in seconds, with no tools, clamps, glue, or heat required. For anyone working in tight engine compartments, under sinks, or inside RV cabinetry, this is a genuine game-changer.

Wide Tubing Compatibility

Available in both imperial and metric sizes, AquaLock connectors offer push-to-connect functionality for potable water, raw and fresh water washdown, live well systems, hot and cold water lines, and drain lines — compatible with copper, PEX, and CPVC tubing without leaks or flow restriction. The Large Diameter Series further expands compatibility: it offers universal compatibility with copper, CPVC, PEX, LDPE, MDPE, HDPE, and polypropylene tubing, making it suitable for virtually every major tubing type used in water system applications.

Engineered for Leak-Free Performance

AquaLock's engineering goes beyond simple push-fit convenience. The Plastic Series features a zero-leak patented O-ring guide that protects the O-ring from damage during connection, helps align the tubing with the O-ring every time, and prevents the O-ring from becoming dislodged. Meanwhile, stainless steel collet clips grip tubing firmly while allowing for easy disconnection when needed — an engineered collet system that prevents accidental disconnection while maintaining the ability to service and reconfigure systems.

Product Lines Available

The AquaLock lineup for pressurized water systems covers a broad range of configurations to match almost any installation scenario:

• Brass Fittings — wetted surfaces contain less than 0.25% lead by weight, meeting strict potable water safety standards
• Plastic Fittings — including couplings, elbows, tees, manifolds, valves, and pump fittings, all with the patented O-ring guide technology
• Mini Fittings — compact profile for space-constrained installations
• Hoses — flexible line solutions to complete your pressurized water system build-out
• Large Diameter Fittings — NSF-certified materials meeting industry standards for potable water applications, providing peace of mind for commercial and high-flow installations where regulatory compliance is critical

Where AquaLock Fittings Shine

Whether you are plumbing a freshwater system aboard a vessel, routing supply lines in an RV, or building out an onboard washdown system, AquaLock's combination of certified materials, broad tubing compatibility, and genuinely tool-free installation makes it a go-to choice for pressurized water system work. With no pipe stiffeners required for copper and CPVC pipes, AquaLock allows for full flow without additional head losses — a practical advantage in any pressurized system where water delivery performance matters.