Pb attribute

Who is usually responsible for repairing the part of the water pipe.

The water pipe is a water supply pipe. Modern decoration water pipes are built by burying walls. There are three types of water pipes. The first category is metal pipes, such as hot-dip cast iron pipes lined with plastic, copper pipes and stainless steel pipes. The second type is plastic-coated metal pipes, such as steel-plastic composite pipes and aluminum-plastic composite pipes. The third category is plastic pipes, such as PB pipes and PP-R pipes.

In the past, the pipes used for water supply were mainly cast iron pipes. Sand cast iron pipes are mainly used outdoors, and galvanized cast iron pipes are used indoors. However, after several years of use, it is easy to produce a lot of rust and scale, breed bacteria and seriously endanger human health. The state stipulates that from June 1 2000 onwards, sand casting process pipe fittings and cold galvanized cast iron pipes will be eliminated, the use of hot galvanized cast iron pipes will be gradually restricted, and aluminum-plastic composite pipes and new plastic pipes will be popularized.