RLS

RLS is a manufacturer of flame-free refrigerant press fittings for the HVAC/R industry. Introduced to market in 2015, RLS LLC is headquartered in St. Louis, Missouri, and operates as a subsidiary of Marmon Holdings Inc., a Berkshire Hathaway company. RLS is the inventor, patent holder, and manufacturer of the original HVAC/R press fittings. With more than connections installed globally, RLS fittings have become a standard method for joining refrigerant copper tube across residential, commercial, and industrial HVAC applications.

Product Lines

• Press fittings in 13 sizes from 1/4 inch to 2-1/8 inch
• Core types: elbows, couplings, tees, reducers, service valves, 3/8-to-5/16 inch reducer
• RLS XL Line: 1-5/8 inch and 2-1/8 inch for commercial and VRF applications
• Ancillary: P-traps, Y-joints, ball valves, sight glasses
• Press tools and interchangeable jaw sets in 1/4 inch to 2-1/8 inch

Why Contractors Specify RLS

• No open flame, no hot work permits, no fire watches required
• Installation approximately 60 percent faster than brazing; connections in 10 seconds or less
• UL listed to UL 207; ICC-ES evaluated; rated to 700 psi MRP, 2,100 psi burst
• Compatible with R-410A and A2L refrigerants (R-32, R-454B)
• Operating temperature range: -40 degrees F to 300 degrees F
• 15-year manufacturer warranty; designed, engineered, and made in the USA

How to Choose an RLS Product

Match the fitting size to the copper tube OD. Confirm refrigerant compatibility (R-410A and approved A2Ls). For VRF or large commercial line sets of 1-5/8 inch or 2-1/8 inch, use the RLS XL line. Verify press tool and jaw compatibility and review RLS certification documentation for local code acceptance.

Frequently Asked Questions

• Are RLS fittings compatible with A2L refrigerants? Yes, approved for R-32 and R-454B in addition to R-410A.
• What press tools work? RLS-compatible jaw sets fit major battery-powered press tool platforms. See the RLS compatible tool list for details.
• Maximum operating pressure? 700 psi MRP (48 bar); 2,100 psi minimum burst pressure per UL 207.
• Warranty? 15-year manufacturer warranty.
• Post-installation inspection required? No. A completed press cycle confirms the connection. No flame residue or braze inspection needed.