Flame-free HVAC/R joints: proven reliability with no fire hazards
RLS press fittings are the fast, safe, consistent alternative to brazing. Get permanent mechanical joints every time, in seconds. UL listed to 700 psi. 20 million fittings installed since 2015. (read more)

Now, get 2 FREE jaws with the purchase of a Klauke 19kN Tool & 5-Jaw Set For a limited time, purchase our Klauke 19kN Tool and 5-Jaw Set and receive (read more)

RLS Fittings Provide the Perfect Solution for the Smithsonian Institute. When irreplaceable historical artifacts and national treasures are at risk, the use of an open flame nearby is just too dangerous. So RLS press fittings were the obvious choice for a project at a Smithsonian Institute building, rather than brazing. (read more)

Faster and Easier: RLS Press Fittings let you make a permanent and reliable mechanical connection in just 10 seconds, without the need for brazing. That means significant time and cost savings. In fact, eliminating the brazing step means installation goes up to 60% faster! (read more)

RLS Press Fittings let you make a permanent and reliable mechanical connection in just 10 seconds, without the need for brazing. That means significant time and cost savings. In fact, eliminating the brazing step means installation goes up to 60% faster! (read more)

Converting from brazing to flame-free RLS Press Fittings can result in significant time and cost savings, substantially higher productivty and a much safer work environment. (read more)

Sean Kelleher, RLS Director of Engineering, Named to Prestigious “40 Under 40” List. We’re proud to announce that our own Sean Kelleher has been honored by The ACHR NEWS, one of the HVAC/R industry’s leading publications, in its ninth annual Top 40 Under 40 List. (read more)

As the use of flammable refrigerants in the HVAC and refrigeration industries continues to increase, the safety of flame-free RLS Press Fittings will become even more important. (read more)

FLAME - FREE
No fire spotters, no hot work permits, no nitrogen purging. (read more)

RLS ODM Filter Driers help protect HVAC/R systems from moisture (water), acid and particulates, helping to optimize their performance and provide the longest life possible. (read more)

This new video captures a day in the life of Jamie Christensen of Elevated Mechanical as his firm installs a 26-ton Mitsubishi CITY MULTI VRF system – with a little help, of course, from some RLS press fittings. (read more)

Consistent, reliable, flame-free HVAC/R joints — with no fire hazards (read more)

RLS is proud to announce the launch of our new RLS Certified Installer online training program at training.rapidlockingsystem.com. The new training portal walks HVAC/R contractors through the step-by-step process. (read more)

A hard plastic carrying case, plus a depth gauge, press gauge, abrasive pad and permanent marker. (read more)

Consistent, reliable, flame-free HVAC/R press connections — in just 10 seconds,. RLS press-to-connect fittings replace brazing, resulting in permanent metal-to-metal mechanical joints (UL listed to 700 psi). Field-proven since 2015 with over 15 million installed. (read more)

Consistent, reliable, flame-free HVAC/R joints — with no fire hazards (read more)

RLS press-to-connect fittings are faster, safer and more consistent than brazing, resulting in permanent, metal-to-metal mechanical joints every time. UL listed to 700 psi. Field-proven since 2015. Over 15 million installed. (read more)

We tested one of our fittings with no seal to demonstrate the strength of our joining method! This fitting withheld pressure to 3044 psi before the tube burst near the end cap. (read more)

We know, every contractor wants more tools! But when it comes to press tools, the costs can add up quickly. So if you can do more work with a tool you’ve already invested in – and avoid buying a new one – it’s a win-win proposition. (read more)

Now RLS fittings can be pressed with most major press tools in use today!

We know, every contractor wants more tools! But when it comes to press tools, the costs can add up quickly. (read more)

Rapid Locking System LLC (RLS), developer of the first press-to-connect fittings for the HVAC and refrigeration industries, now offers new 32 kN jaws, which are compatible with most of the larger press tools currently in widespread use. (read more)

RLS Press Fittings let you make a permanent and reliable mechanical connection in just 10 seconds, without the need for brazing. That means significant time and cost savings. In fact, eliminating the brazing step means installation goes up to 60% faster! (read more)

Everything you need to know about the Rapid Locking System is available in one convenient place in the RLS Toolbox. From instructions on how to use our 10-second, flame-free press fittings for HVAC and refrigeration, to our complete product catalog, to an easy way to get a quote from an RLS distributor – and so much more – it’s all in the RLS Toolbox! (read more)

After many months of construction and preparation, the entire RLS office staff is now under one roof – each with his or her own private office – at the new company headquarters in St. Louis, Missouri. (read more)

Alex Bishoff, owner of Howard Mechanical Services, discusses his views on RLS press technology and how it helps make his business more efficient. (read more)

RLS has passed 5,000 followers on Instagram! Why? RLS is the original, patented, proven flame-free press fittings for high-pressure HVAC and refrigeration applications. (read more)

RLS-compatible jaws now available from Milwaukee – for a range of 32 kN tools!
Milwaukee Tool recently introduced RLS-compatible jaws for their M18 FORCE LOGIC press tools. These new jaws also work on most popular tool brands (read more)

New 32 kN press tools and jaws from Klauke!
Our new 32 kN RLS press tools are able to press ALL of our fittings – from 1/4" all the way up to 2-1/8". And they can deliver 350-400 presses on a single charge! Plus, our new jaws are also compatible with most other 32 kN press tool brands (read more)

After extensive research, development and testing, we're proud to introduce our RLS "XL" line of 1-5/8" and 2-1/8" couplings, elbows, tees and reducers. Now you can enjoy the increased productivity of RLS fittings on those big jobs, too! (read more)

Milwaukee® Tool Introduces RLS-Compatible Jaws for its M18™ FORCE LOGIC™ Press Tools. RLS press fittings connect in 10 seconds using a battery-powered tool and jaws, replacing the time-consuming process of manually brazing HVAC/R joints. (read more)

RLS Announces Major Expansion with New Headquarters Building, Manufacturing Plant and Training Center in St. Louis, Missouri. (read more)

Converting from brazing to flame-free RLS Press Fittings can result in significant time and cost savings and substantially higher productivity. Eliminating the brazing process means installations can be completed up to 60% faster. (read more)

RLS Long Radius 90° Elbows: The key to system efficiency! (read more)

In this business, you work smarter every day – relying on the right people, right products and right tools to get the job done right and maintain your reputation. It’s time to say yes to press fitting technology for greater efficiency, consistency, and safety at every connection. (read more)

Watch this hydrostatic test we turn the pressure up to see just how far we can push the fitting and copper tube. Watch Now (read more)

We aren’t lying when we say our fittings are the best! This fitting held until 4157 PSI before bursting so hard it popped the battery out of our gauge. This is a new personal record for the 1 1/8”. (read more)

The new portal explains our patented press technology, how and why it works so well, and the steps required for proper installation. Both audio descriptions and video demonstrations are used to reinforce the material and facilitate learning. (read more)

RLS ODM Sight Glasses are designed to work with RLS press fittings and show at a glance whether the refrigerant in a commercial HVAC or refrigeration system is wet or dry. Compared to competitive models, RLS Sight Glasses offer a longer overall tube length, a higher pressure rating and all copper stubs. (read more)

Maintaining appropriate refrigerant flow in an HVAC/R system is critical to minimizing pressure drop and maximizing efficiency. (read more)

Our original, patented, proven RLS press fittings (previously sold under the ZoomLock brand) were specifically designed for HVAC/R and have been in use for nearly 6 years. So why choose a modified plumbing fitting when you can choose a fitting with a proven track record? (read more)

With RLS press fittings, there's no open flame...which means no fire spotters, no hot work permits, no nitrogen purging and no hauling brazing equipment to the job site. (read more)

“The new portal explains our patented press technology, how and why it works so well, and the steps required for proper installation. Both audio descriptions and video demonstrations are used to reinforce the material and facilitate learning.” (read more)

RLS LLC, manufacturer of the first press-to-connect fittings for the HVAC and refrigeration industries, announces the launch of their new RLS Certified Installer online training program at training.rapidlockingsystem.com. (read more)

RLS ODM Ball Valves (Bi-Directional with Schrader valves) are designed to work with RLS press fittings in refrigeration and commercial HVAC applications. RLS Ball Valves are approved for R410A (up to 900 PSIG), are UL rated, feature pure Teflon seals to eliminate leaks and offer a 2-year manufacturer’s warranty. (read more)

RLS ODM Filter Driers work with RLS press fittings and protect HVAC and refrigeration systems by eliminating moisture (water), ACID and particulates. All RLS Filter Driers use XH11 desiccant, a more effective choice than most filter driers on the market. (read more)

Now, get the real story about HVAC/R press fittings by connecting with us!

No matter how you like to get information, we’ve made it easy for you to connect with RLS! We’re now on Instagram, Facebook, Twitter and LinkedIn, where you can get the latest information on RLS and ask us any questions – or give us any feedback – you may have. (read more)

RLS has recently updated its website to include new BIM (Building Information Modeling) content for all of its patented HVAC/R press-to-connect fittings. BIM objects are downloadable for use in Autodesk Revit. In addition, the fittings section of the RLS website now includes much more detailed product information, such as specifications and dimensions for every fitting in every size. (read more)

With RLS Press Fittings, jobs can be completed successfully by fewer people in significantly less time. That not only results in increased productivity on each job, but also the ability to get to the next job faster and get more jobs done. (read more)