Deatschwerks offers a full line of AN fittings and hose to assist in the plumbing of virtually any fuel system. Fittings, manufactured from heat-treated 6061-T6 aluminum that is hard anodized and titanium finished, meet JIC and SAE standards. A Comprehensive Offering of Lines and Fittings Created Specifically for Fuel System Plumbing... Brought to You by the Leader in Performance Fuel Systems. Plumbing a fuel system has always been more difficult than it should be. Countless hours can be spent pouring through multiple vendor sites and hundreds of non-fuel-specific part numbers in search of that one specialty fitting you need. The DW plumbing line-up is designed to simplify this process by providing everything you need and nothing you dont