Water pipe is the basic building materials in home improvement, and it is one of the essential materials for home improvement. We will answer the types of water pipes used in home improvement, how to buy water pipes, identification methods, water pipe installation process and what problems need to pay attention to.
The selection and installation of water pipes in “hidden works” has become a problem that cannot be ignored in decoration. In order to make the living room beautiful, people generally use buried wall construction when decorating the water pipe, once the water pipe leakage and burst will bring irreparable consequences.
In the past, the pipes used for water supply were mainly cast iron pipes. Outdoor mainly used sand cast iron pipe, indoor use is galvanized cast iron pipe, which can be divided into cold (electric) galvanized and hot-dip galvanized two. Galvanized pipe as a water pipe, after several years of use, the pipe produces a lot of rust and scale, the yellow water flowing out not only contaminates the sanitary ware, but also contains bacteria that are not smooth inside the wall, and the corrosion causes the heavy metal content in the water to be too high, which seriously endangers human health. The state has stipulated that from June 1, 2000, sand mold casting pipe fittings and cold galvanized cast iron pipe shall be eliminated, and the use of hot plated cast iron pipe shall be gradually restricted, and the use of aluminum-plastic composite pipe and new plastic pipe shall be promoted. Therefore, there are three main categories of pipelines currently in use. The first type is metal pipe, such as plastic lined hot plated cast iron pipe, copper pipe, stainless steel pipe and so on. The second type is plastic clad metal pipe, such as plastic clad steel pipe, aluminum-plastic composite pipe and so on. The third type is plastic pipe, such as PP-R (cross-linked polypropylene high-density mesh engineering plastic).
The State also stipulates that all kinds of pipes and fittings involving drinking water pipelines must have the approval of the health department before they can be sold. The following describes several more common types of water pipes, and purchase identification methods:
(1) Plastic composite metal pipe – aluminum-plastic composite pipe
Aluminum-plastic composite pipe is a more popular pipe in the market, its light weight, durable and convenient construction, its bendability is more suitable for use in home improvement. The main disadvantage is that when used as a hot water pipe, long-term thermal expansion and contraction may cause misalignment of the sleeve connection, resulting in leakage. At present, there are many varieties of aluminum-plastic composite pipes sold in the market, and the quality and price vary greatly. How to buy aluminum-plastic composite pipe has become a headache for the majority of consumers.
① Check the appearance of the product
Excellent quality aluminum composite pipe, the general outer wall is smooth, the trademark, specification, applicable temperature, meter number and other marks on the pipe wall are clear, the manufacturer also prints the production number on the pipe wall, in order to be ready to monitor the product quality at any time; The product is well packaged, and the various marks on the package are equally clear, and the manufacturer’s name, address, telephone number and so on are printed on the prominent position. Shoddy products generally have rough outer walls, unclear or incomplete labels, simple packaging, and unknown factory addresses or telephone numbers.
② Aluminum layer can not be ignored
A good aluminum-plastic composite pipe is welded at the aluminum layer overlap, and the aluminum layer and the plastic layer are tightly combined without delamination. And fake products some aluminum layer overlap is not welded, and some aluminum layer and plastic layer are often stratified, not tight.
(2) Plastic pipe -PP-R pipe
As a new type of water pipe material, PP-R pipe has unique advantages, its non-toxic, light weight, pressure resistance, corrosion resistance, the use of special hot melt connection, will not corrosion rust, and PP-R pipe will not scale, is becoming a popular material. Due to its relatively simple production process, there are a large number of counterfeit products on the market at present. In order to help the owner to initially identify the authenticity of PP-R pipes and fittings from the appearance and feel, the following identification methods can be referred to:
① Product name: the real PP-R product name should be “polypropylene pipe for hot and cold water or” PP-R pipe for hot and cold water “, where the title of ultrafine particle modified polypropylene pipe (PP-R) or PP-R cold water pipe, PP-R hot water pipe, PP-E pipe and other informal names are pseudo PP-R pipe.
The density of pseudo PP-R is slightly larger than that of true PP-R.
③ The true PP-R tube is white matte or other color matte, and the pseudo-PP-R tube is bright or colorful.
The true PP-R tube is completely opaque, and the pseudo-PP-R tube is slightly transparent or semi-transparent.
⑤ Real PP-R tube feel soft, pseudo PP-R tube feel smooth.
The real PP-R tube landing sound is more dull, and the pseudo-PP-R tube landing sound is clearer.
It should be noted that the service life of the pseudo-PP-R tube is only 1-5 years, while the service life of the real PP-R tube is more than 50 years.
(3) Metal pipe – copper pipe
Copper pipe has the advantages of corrosion resistance, bacteria-elimination, etc., is the best product in the water pipe, the way of copper pipe interface has two kinds of card sleeve and welding. The card sleeve is the same as the aluminum-plastic pipe, which has the problem of aging water leakage for a long time, so most of the users who install the copper pipe use the welding type, and the welding is that the interface is welded together through oxygen, so that it can be the same as the PP-R water pipe, and never leak. One disadvantage of copper pipes is that they conduct heat quickly, so the hot water pipes produced by famous copper pipe manufacturers are covered with plastics and blowing agents to prevent heat loss. Another disadvantage of copper pipe is the price is expensive, very few residential water supply system is copper pipe, I am afraid that only in the export apartments and high-end villas will be seen. If you plan to change the water pipe and feel that the copper pipe is good, it is recommended to use the welding interface.
(4) Metal pipe – stainless steel pipe
It is a very expensive water pipe, difficult to construct, rarely used, and similar in performance to copper pipe.
The above is the relevant content of the water pipe that we recommend for you, and I believe that you also understand. If you want to deeply understand the content of home improvement, be sure to continue to pay attention to Fuwo home network! More pure dry goods to feed you!
