Fernco Inc. P44U-305 4-Inch by 3-Inch Bushing 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 Bushing Sewer pipe compression joint sealer Flexible PVC donut shaped rings for the compression sealing of sewer pipe joints and DWV connections such as sockets, hubs, bells and spigots Offers all of the properties necessary to create a strong lasting joint 4-Inch x 3-Inch