When installing pipes, special cutters must be used to cut the sections perpendicular to the axis. The distance between two socket-type flexible connections is recommended not to exceed 3m. The length adjustment can be compensated by the depth of the socket. However, the maximum length of the pipe after being inserted into the bottom of the fitting shall not exceed 8mm in summer and 12mm in winter. Key points for the installation of socket and screw-pressed PP ultra-quiet drainage pipes: Use a special pipe-cutting machine (cutting machine or cutter) to cut the pipe, and the pipe end should be vertical to the pipe axis. Put the threaded ring, clamp ring and sealing ring on the connected pipes in sequence. Insert the head of the pipe into the groove at the inner end of the connector (you can evenly apply lubricant on the head of the pipe); push the pipe to 4mm from the bottom of the inner groove of the pipe fitting, and start tightening the threaded ring to achieve the purpose of a sealed connection. ?