RLS Rapid Locking System
Wholesale Building MaterialsMissouri, United States51-200 Employees
RLS Rapid Locking System develops press-to-connect fittings for HVAC and refrigeration, offering a flame-free alternative to brazing that can reduce time on installation jobs. The product line covers fittings from 1/4 inch to 2-1/8 inch, along with ancillary components that form a complete press system when paired with an approved press tool and jaws. Based in Hazelwood, Missouri, the company operates as a mid-sized enterprise and is part of Marmon Holdings, Inc., a Berkshire Hathaway subsidiary. RLS originated the first press-to-connect fittings and introduced them in 2015 through an exclusive arrangement with Parker-Hannifin’s Sporlan division, sold under the ZoomLock brand; after that private-label relationship ended in 2019, the company began marketing its fittings under the RLS name and, by August 2020, focused on expanding distribution. In 2026, the firm expanded its lineup with the RLS Powered by REMS Press Ring Kit, showcased at the AHR Expo.