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RLS

RLS

RLS

Ditch the torch and connect copper lines in seconds with RLS (Rapid Locking System). As the original HVAC/R press-to-connect solution, RLS fittings offer a flame-free, permanent mechanical joint that is UL-listed to 700 psi. Shop our extensive inventory of couplings, elbows, and tees, as well as the compatible press tools and jaws needed to maximize your job site efficiency.


RLS (Rapid Locking System) has revolutionized HVAC and refrigeration connections with their innovative press technology. The RLS press tool and crimping tools provide a reliable and efficient alternative to traditional brazing, ensuring strong, leak-free joints in a fraction of the time. Designed to work seamlessly with popular tools like RIDGID press tools and the Klauke 19 kN tool, RLS jaws enable quick and secure fittings across a variety of applications. By combining precision engineering with ease of use, RLS tools have become a trusted solution for professionals seeking to improve efficiency and reliability on the job.

What tools do I need to install RLS fittings?

To install RLS fittings, you need a compatible press tool and RLS-approved jaws. While RLS offers their own Klauke-manufactured tools (like the 19kN tool), RLS jaws are also compatible with various press tools from RIDGID and Milwaukee. Always check the specific jaw and tool compatibility matrix to ensure a safe and proper crimp.

Are RLS press fittings reliable for high-pressure refrigerants?

Yes. RLS fittings are UL 207 Listed and rated for pressures up to 700 psi. They use a double circular press pattern and a specialized O-ring to create a permanent, leak-proof seal that stands up to the high pressures of R-410A and modern A2L refrigerants.

Why choose press fittings over brazing?

The primary advantage is speed and safety. Press fittings connect in roughly 10 seconds, require no flame, no nitrogen purge, and no hot work permits. This makes them ideal for repairs in sensitive environments like hospitals, data centers, and occupied office buildings where fire hazards are a major concern.

Why buy RLS fittings from TruTech Tools?

We stock a massive variety of RLS fitting sizes and configurations, ensuring you can finish the whole piping run without waiting on parts. Our team can also help you navigate the complex world of press tool compatibility, ensuring you buy the correct jaws for the press tool you already own or helping you upgrade to a dedicated RLS kit.