BETTER Hammer Unions are widely used in manifolds, line connections, pump suction, pump services, Cementing, and choke-and kill lines. Series of hammer unions are made of different material to suit different pressure, environment request. From 1,000 psi to 20,000 psi in general service or corrosion service. Features • Replaceable, lip-type seal provides primary seal, protects secondary metal-to- ...