Since the introduction of SmartLock's advanced metal-to-metal sealing technology, we’ve made connecting refrigerant lines simpler, safer, and more reliable than traditional methods. Our fittings eliminate the inconsistencies of flaring and brazing, but knowing a few key best practices can ensure a perfect seal every time. The team at SmartLock is committed to your success, so we’ve compiled our top tips to make your transition to our superior technology seamless and guarantee optimal performance on every job site.
Tips for Installing Our Flareless Tube Fittings

Proper Tube Preparation is Key
Before installation, the copper or aluminum tube end must be cut cleanly and be free of burrs. We recommend using a sharp tube cutter and then lightly deburring the tube’s inner and outer edges. A clean, smooth surface is vital for the metal-to-metal seal to engage correctly. Taking this small extra step ensures the long-term integrity of your flareless HVAC fittings installation and prevents potential leaks down the road.

Always Use the Correct Torque
The most important factor for a perfect connection is applying the correct torque. We provide a precise torque chart for every fitting size. Using a calibrated torque wrench is not optional—it’s essential. Applying too little torque will result in a leak, while too much can damage the fitting. Trust the science of the tool, not just the feel, for all our flareless HVAC fittings.

Confirm Cleanliness Before Assembly
Even if the tube is perfectly cut, residual debris or moisture can interfere with the sealing surfaces. Before sliding the tube into the fitting, ensure both the tube end and the internal mechanism of the SmartLock fitting are completely clean. We advise a quick wipe-down to remove any contaminants. A contaminant-free environment is critical to achieving the ultimate, high-pressure, metal-to-metal seal our technology is known for.

Double-Check Alignment and Insertion
When inserting the tube, make sure it is fully seated and aligned straight into the fitting before beginning to tighten. The tube must not be inserted at an angle. Listen for the subtle click or feel the tube bottom out within the fitting to confirm proper seating. Correct alignment ensures uniform pressure is applied during tightening, maximizing the performance and longevity of your flareless HVAC fittings connections.
Our goal is to revolutionize the way you work, making installations faster, safer, and more reliable. By following these straightforward tips, you maximize the inherent benefits of SmartLock’s innovative sealing technology. The best way to achieve success in the field is through proper technique. Let our experts help you master the installation and enjoy the future of refrigeration line connections. Contact The Global SmartLock Group today for more training resources.
