Across the three pass by the three pass and three pass straight pipe connected at both ends, three straight with guiding angle, three branch port has a flange on the end surface of the flange plate with mounting holes, sealing line, arc groove, strengthening ribs are arranged at the connection flange and the three branch. Across the three way has the advantages of low cost, high strength, can be used for water supply and drainage, agricultural irrigation, drip irrigation, chemical industry and so on, across the three pass also can be used in the field of wire and cable, pipe connection, bifurcation, spanning three pass quality assurance!