Plumb Shop Brasscraft CSSC12E-48P 3/4-Inch MIP x 3/4-Inch FIP x 48-Inch Gas Connector, (5/8" OD, 1/2" ID) Use with large demand residential, RV/mobile home, and commercial gas appliances not subject to frequent movement Not to exceed 75,000 and 135,000 BTU's at maximum capacity CSA approved for indoor and outdoor use as well as for mobile home cross-over and foundation-to-gas supply connections The Safety+PLUS excess flow valve protects the home from fires and explosions due to gas line ruptures and disconnects at the appliance ProCoat polymer coating resists corrosion due to harsh chemical residue and vapor exposure in common household cleaning, plumbing repair, and masonry products