A bung connection for a rigid container has a bung body which threads into the bung opening, and has a base wall with two or more access openings which are connected to tubes extending to the flowable material in the container. A tube mounting is removably inserted into the bung body and has flow ports which connect with the access ports in the base wall. Flow tubes connect to the tube mounting. The tube mounting and bung body have a coded pattern of interfitting lugs and recesses which prevent full assembly of the tube mounting and bung body if the coding is wrong. A clamp ring secures the tube mounting in the bung body. A shipping plug and liner replace the tube mounting in the bung body for shipping the container to be refilled and then returned for use again.