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RLS Press Fittings

The Trade's Most Trusted Brand

Pros don't take trust lightly.

They trust their tools, their training, and their experience—because every job is a reflection of their reputation. A solid connection and a job done right the first time—that’s what matters most.

That’s why more pros trust RLS press fittings than any other brand.

For over a decade, RLS has set the standard in HVAC/R press, delivering the reliability, performance, and support that contractors count on. Tested to the highest standards and built for the toughest jobs, RLS fittings give you the confidence to press forward—without second-guessing your connections. Because when it comes to HVAC/R press, trust isn’t given. It’s earned.

Why Trust RLS?

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Trusted Expertise

As pioneers in press technology, we're committed to making connections faster, safer, and more reliable. Backed by over a decade of innovation, our patented PressSure™ System has been refined to deliver consistent, durable, and trustworthy performance you can rely on.

Trusted Performance

Our annealed copper fittings are work-hardened during pressing for added strength. This forms two 360° mechanical press bands, creating a reliable union. The HNBR seal—shielded from environmental wear—ensures a leak-proof connection. This fusion of strength and durability delivers the performance you demand on every job.

Trusted Partnership

We are deeply committed to your success. With a focus on quality and consistency at every touchpoint, our customer-centric approach and dedication to long-term success make us a reliable and trusted partner in the industry and a valuable ally in the growth of your business.

"The proven reliability and resilience of XL press fittings from RLS has me very excited about the positive impact they could have on our business going forward.”

– Almir Kapetancic, Account Manager – Enginuity

“I know when I use the RLS fitting that it is not only easy to install but also durable, as we have not had any issues with our press fittings to date.”

– Jeff Demasari, Lead Installer – First Choice Heating & Cooling

“If we need to use copper fittings on any job, we’re definitely going with RLS.”

- Zak Gharbieh, Sales and Service Manager – Quality 1

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PressSure™

HVAC/R Pressing Technology

The RLS® PressSure™ System is a patented technology that ensures secure, reliable, and long-lasting connections for HVAC and refrigeration systems.

This innovative system utilizes an annealed copper component with dual mechanical and static seals for a 360° leak-proof connection. The unique work-hardening process strengthens the copper during pressing, providing enhanced durability and resistance to pressure fluctuations and vibration over time. With a wide range of jaw and fitting sizes, the system offers unmatched flexibility making it the ideal solution for HVAC/R professionals to press forward with confidence.

Annealed Copper

RLS PressSure™ fittings are heated to over 1,000°F and then slowly cooled–a process called annealing. This softens the copper, improving its ductility during pressing. Annealing also enhances durability, preventing cracks under pressure and helps the material withstand thermal expansion and contraction.

Dual-sealing Technologies

The PressSure™ system features a dual-radial press that forms two uniform mechanical seals—delivering a precise, secure fit while protecting and reinforcing the HNBR seal. This ensures a consistent 360° seal for reliable leak protection, even under extreme pressure and temperature variations—remaining free from pinch points or deformation common to other systems.

Work-hardening Process

The PressSure™ work-hardening process takes place during the pressing of annealed copper, altering the material’s molecular structure to increase strength and resistance to wear. This forms two 360° mechanical press bands, creating a durable union and shields the HNBR seal from environmental wear. The result is a strong, long-lasting fitting that supports consistent system performance over time.

Maximum Versatility

The PressSure™ system is engineered for versatility, offering a wide range of fitting sizes and compatible jaw options to meet the demands of any installation—from large systems to tight spaces. With sizes ranging from 1/4 in. to 2-1/8 in., PressSure™ provides a flexible, efficient solution for diverse jobsite conditions.

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The Most Complete Line of HVAC/R Press Fittings

Exclusive Industry-Leading Size Range: 1/4 in. to 2-1/8 in.

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