For your next HVAC, Refrigeration or mechanical project use Mueller 3/8 in. I.D. x 250 ft. Type L Yellow Plastic Coated Soft Copper Tubing. This copper tube is manufactured for use when copper tube is to be buried or used in a potentially aggressive environment. Some building and insulation materials may contain chemicals that are potentially corrosive to plain copper tube, requiring it to be protected to ensure its longevity in service. Our plastic-coated copper tube eliminates the need for on-site tape wrapping or sleeving, creating a savings on labor and ensuring a professional-looking installation. It can be used in a wide variety of situations including reclaimed water applications and the movement of natural gas.For use when copper tube is to be buried or used in a potentially aggressive environment0.025 in. minimum polyethylene coating extruded directly onto copper tube for consistent corrosion protectionContinuously marked with size, specification and footage every 2 ft.Made to ASTM and NFPA standardsCreates a savings on labor and ensuring a professional-looking installationUse in accordance with local building codes