301-119NL - 2-1/2 FNPT x Sweat T-571NL Dielectric UnionLegend 301 119NL 2 1 2 FNPT x Sweat T 571NL Dielectric Union Features High strength, galvanized cast iron construction make them ideal for commercial and industrial applications. Designed to reduce stray current and galvanic corrosion where two dissimilar metals are joined. Self aligning, non conductive elastomer gasket and thermoplastic insert create a positive seal and complete isolation between the tubing and piping ends. Optional high temperature