1.1 This specification covers the materials and testing of shielded hubless couplings to join hubless cast iron soil pipe and fittings. 1.2 Several different types of hubless couplings are available for use in hubless cas This specification covers the materials and testing of shield hubless couplings to join hubless cast iron soil pipe and fittings. Gaskets shall comply with the required physical and chemical properties, dimensions, and material specifications. The rubb