Chamberlin Rubber Company, Inc. provides you with superior fire retardant hose assemblies of unparalleled quality and integrity, designed specifically for hydronic heating and cooling systems. ChamFlex® is a “Class A” fire rated hose assembly with fixed male pipe thread on one end and swivel with male pipe adapter on the other end. Our tube compound has been tested to, and awarded, a UL 94 V-0 fire rating, the highest standard in the industry. The patented process, which bonds the inner tube to a stainless steel wire outer braid minimizes the possibility of the hose assembly kinking during installation. Assemblies for 1/2” and 3/4” hoses are available in a minimum length of six inches with increases of one inch. Minimum length for 1” and 1 1/4” hose is nine inches with one inch increments. In short—ChamFlex® provides you a hose with a long life of trouble-free service.