1. Aluminum-plastic composite pipe

The loss of aluminum-plastic composite pipe is small, and the coil pipe is easy to transport, can be cut at will, and is easy to install and construct. However, the fittings are made of pure copper, which is expensive. The inner diameter of copper is smaller than that of aluminum-plastic composite pipe, and the caliber flow is small, and it is easy to leak when it is not installed well. Pipelines are easily damaged by other professional construction processes, and spare parts are wasted when repairing, so the cost is high. Aluminum-plastic pipe is made of high-density polyethylene sandwiched with aluminum, and the melting point of polyethylene is 14℃, so its long-term high-temperature resistance is good. As long as it is installed correctly, its matching nut-type and steel-sleeve clamp-on pipe fittings have high reliability.

2. PP-R tube?

PP-R pipe is regarded as a green and reliable pipe by building water supply and drainage circles. The pipe fittings of PP-R pipe are also made of PP-R material, which is lower in cost compared with aluminum-plastic composite pipe, and the pipe fittings are installed outside the pipe, so that the flow rate is not reduced. However, the PP-R pipe should not be suspended for a long distance, and a fixed bracket should be set every 5cm or so, otherwise it is easy to sag and bend. In addition to pure PP-R pipes, there are now PP-R aluminum-plastic pipes. The fittings of this kind of pipes are the same as PP-R pipes, but they are equivalent to the performance of aluminum-plastic pipes, with lower cost than aluminum-plastic composite pipes, better anti-aging and strength performance, and long-distance suspension without sagging and bending.

due to the molecular characteristics of polypropylene itself, PP-r pipes, whether imported or made in China, have some shortcomings such as poor high temperature resistance and large linear expansion coefficient. However, its hot-melt connection process is complicated, and it is easy to produce stacking defect area during push connection, which leads to stress concentration and affects the long-term performance of the pipeline. Therefore, when buying, don't easily entrust a hydraulic engineer or some unqualified decoration companies. When buying, pay attention to the actual origin, trademark and after-sales service guarantee of the products.

3. PE tube?

PE pipe has a single structure, and its comprehensive performance is not as good as that of aluminum-plastic pipe. It is mainly used for floor heating pipes. The floor heating facilities are generally completed by builders, and PE pipes are generally not needed for home decoration.

4. PVC-U pipe

The connection mode of PVC-U pipe is gluing, which is easy to fall off and open when it is heated. It is only suitable for underground pipelines or buried pipelines. If it is used for large-diameter high-pressure exposed pipes, special supports must be designed, especially at the corner, and the water impact will cause great damage to the corner. It is not recommended to use PVC-U pipes for water pipes in home decoration, but the threading pipes are generally flame-retardant PVC plastic flat guides (PVC threading pipes).

5. copper tube?

the sanitary performance of copper tubes is superior, but the cost is high. The connection methods of copper pipes are welding (pipe fittings are divided into two types: tin with or without tin) and pipe fittings are clamped (pipe fittings are divided into two types, one is clamp type, the other is inverted bite and rubber ring seal). The pipeline is easily damaged by subsequent construction or secondary decoration.

6. Galvanized pipes

Galvanized pipes are mostly used in old houses. Now, the iron pipes used for gas and heating are also galvanized pipes. After several years of use, a large number of rust scales are produced in the pipes, and the yellow water flowing out not only pollutes sanitary ware, but also is mixed with bacteria bred on the unsmooth inner wall. Corrosion causes high content of heavy metals in the water, which seriously harms human health. At present, galvanized pipes are rarely used for cold water pipes in newly-built residential areas, and galvanized pipes are used for hot water pipes in some residential areas.

7. Stainless steel pipe: it is a very expensive water pipe, which is difficult to construct and rarely used, and its performance is similar to that of copper pipe.

what should I pay attention to when choosing water pipes for home improvement?

1. Choose a good brand of water pipes

It is a good way for owners who don't know the industry to compare and choose according to the top ten brands. At least the quality of the top ten brands will not be bad.

2. Choose from the concept of long-term environmental protection

As we all know, ppr pipes are commonly used in home improvement, and their main advantages are environmental protection and long service life. Usually, PPR pipes imported from Germany are made of environmentally-friendly materials, and their fittings are all environmentally-friendly copper. Unlike domestic PPR water pipe fittings, which are mainly nickel-plated, nickel is more stable but harmful to human health, so it is better to choose environmentally-friendly copper as accessories.

3. Installation and pressure test

After installation, you must not forget to test the pressure, which is generally a booster test. The pressurization test is generally carried out under the condition of 1.5 times water pressure, and there should be no water leakage during the test. As long as the pressure test passes the basic later stage, there will be no water leakage, and the ppr water pipe adopts hot melt technology, which will never leak once it passes the test.