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Fernco
Cast-iron (soil pipe) hub adapters. The cast-iron hub adapter series will connect plastic DWV Schedule 40 or Schedule 30 piping directly into the hub of cast-iron (soil) pipe without packing, chemical mixtures, or other materials. The resultant joint is water and gas tight. The fittings listed are for service weight cast-iron hubs only.
Genova Products Insert Fittings 2 Steel Insert Coupling
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Forney Drain Cock/Comp Tank 1/8 in NPT