What do you mean, water pipes are four points and six points?

Best answer: Four points and six points of a water pipe refer to four branches and six branches, and a few points refer to its size, which is an imperial unit. 1 inch =8 inches =25.4 mm, 4 points means 4 inches equals 1/2 inch, 6 points means 6 inches equals 6/8 inches (3/4 inches), in other words, the water pipe with an outer diameter of 20 mm is four branches, and that with an outer diameter of 25 mm is six branches.

Four points and six points of water pipe refer to four branches and six branches, and a few points refer to its size, which is an imperial unit. 1 inch =8 inches =25.4 mm, 4 points means 4 inches equals 1/2 inch, 6 points means 6 inches equals 6/8 inches (3/4 inches), in other words, the water pipe with an outer diameter of 20 mm is four branches, and that with an outer diameter of 25 mm is six branches.

water pipe:

Water pipes are water supply pipes. Water pipes in modern decoration are all built with buried walls. There are three types of water pipes. The first type is metal pipes, such as hot-dip cast iron pipes lined with plastic, copper pipes and stainless steel pipes. The second category is plastic-clad metal pipes, such as steel-plastic composite pipes and aluminum-plastic composite pipes. The third category is plastic pipe, such as lead pipe and polypropylene fiber pipe.

In the past, the pipes used for water supply were mainly cast iron pipes. Sand mold 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 large amount of rust and scale, which will breed bacteria and seriously endanger human health. The state has stipulated that sand casting process pipe fittings and cold galvanized cast iron pipes should be eliminated from June 1, 2000, the use of hot galvanized cast iron pipes should be gradually restricted, and aluminum-plastic composite pipes and new plastic pipes should be popularized.

The state also stipulates that all kinds of pipes and fittings related to drinking water pipelines must be approved by the health department before they can be sold.

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