引入管是住户室内支管与室外干管之间的连接管。它是联系室内外的桥梁。随着住宅功能的不断完善,引入管的数量也逐步增加,暴露的问题也越来越多,以下指出两点。一、管道设计和土建设计不衔接施工中经常发现地沟标高与基础圈 The introduction pipe is a connection pipe between the indoor branch pipe and the outdoor trunk pipe of the household. It is the bridge that connects the interior and exterior. With the continuous improvement of residential functions, the number of imported pipes has gradually increased, and the number of exposure problems has become more and more. Two points are pointed out below. I. Pipeline design and civil engineering design are not connected. Often found in the construction of the ditch elevation and foundation ring