Tips: 1. The internal thread type can be connected to standard pipe threads, and the socket type corresponds to the outer diameter of the pipe that can be connected. 2. The external thread of the water tank joint is a reverse thread, which can only be fixed on the wall of the water tank with the nut of the water tank joint, and cannot be connected to other pipe fittings. 3. The outer diameter of the external thread corresponds to the opening size of the water tank. 4. The hand-tightening plug is optional and can only be used with the internal thread tank connector.