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PVC-U上下水管,穿越屋面及卫生间楼面时,管洞处需做防水处理。PVC-U管洞堵法与铸铁管、镀锌管洞堵法不同。PVC-U管的温度变形大,如果还采用过去的作法,即采用细石混凝土分二次灌实的方法是防不住水的,下面介绍三种PVC-U管洞堵法。1.加止水圈。止水圈为弹性很大的橡胶
PVC-U up and down the water pipe, across the roof and bathroom floor, pipe holes to be waterproof. PVC-U pipe hole blocking method and cast iron pipe, galvanized pipe hole blocking method is different. PVC-U pipe temperature deformation, if the past practice, that is, the use of fine-grained concrete sub-irrigation method is unable to prevent water, the following describes the three PVC-U pipe hole blocking method. 1. plus stop water ring. Sealing ring for a very flexible rubber