A connector (200), especially for use with a single or double milk extraction system, including a manifold (202), said manifold including a three-way passage formed therethrough, said manifold (202) a first orifice (204), a second hole (206), a third hole (208) and a fourth hole (210), said first, second and third holes (204, 206, 208) being in fluid communication with said three-way passage , and the fourth orifice (210) not being in fluid communication with said three-way passage； a first tube (212) connected to and in fluid communication with said first hole (204), a second tube (216) connected to and in fluid communication with said second hole (206)； and a third tube (220) connected to and in fluid communication with said third hole (208), wherein said third tube (220) is sized and shaped to be able to connect to a vacuum source, characterized in that said first tube (212) ends with a first plug element (214), said second tube (216) ends with a second plug element (218), said fourth hole (210) is sized and shaped to receive one of said first plug element (214) and said second plug element (218) to allow a predetermined amount of fluid to pass through an escape path (A, B) when received, where said escape path (A, B) is formed in said manifold (202 ).Un conector (200), especialmente para uso con un sistema para extracción de leche simple o doble, incluyendo, un colector (202), incluyendo dicho colector un paso de tres vías formado a su través, incluyendo dicho colector (202) un primer orificio (204), un segundo orificio (206), un tercer orificio (208) y un cuarto orificio (210), estando dichos orificios primero, segundo y tercero (204, 206, 208) en comunicación de fluido con dicho paso de tres vías, y no estando el cuarto orificio (210) en comunicación de fluido con dicho paso de tres vías； un primer tubo (212) conectado a y en comunicación de fluido con dicho primer orificio (204), un segundo tubo (216) conectado a y en comunicación de fluido con dicho segundo
