BrassCraft Speedi Plumb PLUS 3/4 in FIP inlet x 3/4 in Female Iron Pipe outlet flexible braided polymer water heater connector (0.57 in. I.D.). Used to connect the water supply to your water heater, this connector features a patented polymer-braided jacket specially engineered to be less abrasive and more flexible than the leading connectors. The polymer fibers bend freely without kinking, crimping or flattening, making installation easier, especially in cramped quarters. The EPDM rubber core is a non-conductive material. The absence of dissimilar metals within the waterway eliminates the potential for internal corrosion.