Abstract: A pipe made of plastics includes a female end with a bell joint suitable to receive a male end of another pipe and an inner wall with a seat for a gasket suitable to abut an external wall of the male end. When the pipe and other pipe are connected, a joint is formed having a hydraulic seal. The inner wall of the bell joint has at least one closing lip with an annular shape, which extends towards the inside of the bell joint, towards an external front edge of the bell joint, and includes an abutment edge, which adheres to, and tightens with a predefined force, the external wall of the male end. The closing lip is interposed between the external front edge and the seat and forms, with the inner wall, an annular cavity that opens in the direction of the external front edge.

Abstract: A pipe made of plastics includes a female end with a bell joint suitable to receive a male end of another pipe and an inner wall with a seat for a gasket suitable to abut an external wall of the male end. When the pipe and other pipe are connected, a joint is formed having a hydraulic seal. The inner wall of the bell joint has at least one closing lip with an annular shape, which extends towards the inside of the bell joint, towards an external front edge of the bell joint, and includes an abutment edge, which adheres to, and tightens with a predefined force, the external wall of the male end. The closing lip is interposed between the external front edge and the seat and forms, with the inner wall, an annular cavity that opens in the direction of the external front edge.