Water supply and drainage plastic pipe is a new type of chemical building material that is vigorously developed and applied in China. It has the advantages of light weight, strong chemical corrosion resistance, low resistance to conveying fluid, easy to block, easy to install and energy saving. As a building water supply and drainage pipeline, it can alleviate the shortage of steel and energy shortage in China, and the economic benefits are very significant. However, in the process of promotion and application, especially in the past few years, there have been many problems in the process of installation and use. The following countermeasures are proposed for the causes of the leakage of water in the plastic pipes for water supply and drainage.

The main causes of leakage are: the quality of building materials is not tight, the quality of construction is problematic, and the acceptance of the project is not standardized.

1. Pipe quality problems There are a small number of water supply and drainage pipe fittings due to the quality of the material itself (such as insufficient wall thickness of the pipe, excessive filler material in the product composition, excessive deviation of the straight pipe and pipe socket socket size, etc.), causing pipe rupture Leaky.

2. Adhesive quality problem In order to reduce the cost, the project uses a low-cost and low-cost adhesive, which is leaky due to its unstable quality and poor adhesion.

3. Construction quality problems The construction unit of the project has insufficient construction experience for the drainage UPVC plastic pipe. During the installation process, the construction workers are perfunctory, so that the construction quality is not guaranteed, causing many hidden dangers.

4. The problem of non-standardization of acceptance work The current national situation is that the installation project is mainly controlled by the on-site supervisors hired by the construction unit, and the quality of these on-site supervisors is uneven, the closed-water test of the drain pipe, and the pressure test of the water supply pipe The operation acceptance is not carried out according to the requirements of the construction acceptance specification, leaving behind the trouble for the developers and users.

How to avoid the leakage of UPVC plastic pipe, we must increase measures and countermeasures.

First of all, strengthen the material entry management, strictly control the quality of incoming goods, and prevent unqualified products from entering the construction site. The building materials entering the construction site must have the production and sales license and product certification approved by the local construction authority. The pipes, fittings and adhesives should be supplied by the same formal production plant.

Second, strengthen construction management, improve the worker training system, and promote the system of workers holding certificates. At present, the quality of construction workers on the construction site is uneven, and there are a large number of untrained migrant workers. Many of these migrant workers are hired on a temporary basis. They have little knowledge of the construction procedures. If they get the money, they may leave. No matter the quality of the construction. In addition, the labor-management relationship on the construction site is tense, and there are often wage arrears. Some installers vent their anger. Dissatisfied in the heart, in the work deliberately do not operate according to the process requirements, and even smashed the pipeline, pour the remaining sand waste into the toilet, causing pipeline blockage, leakage and other phenomena to occur, so the need to improve the site employment system.

Third, vigorously promote the adoption of the project construction supervision system, and the construction unit employs a qualified supervision company to supervise the quality of the project. At present, most of the quality problems appearing on many construction sites are caused by the lack of normal management supervision. Many construction supervisors hired by many construction units are not professional enough, and some people are not professional enough. It is often difficult to achieve real engineering. Supervised role. The formal supervision company's engineering supervisors are all certified to work, familiar with relevant regulations, and can control the quality of the project. The construction quality was controlled and the leakage problem was basically eliminated.

Fourth, start from the source and take concrete measures to prevent leakage problems in the design drawings. Improve the structural form of the bathroom.

1 Select the rear-row sanitary ware, and install the side wall floor drain on the floor.

2 Designing a partial sunken bathroom, reducing the number of holes in the pipeline through the floor, can effectively solve the leakage problem of the pipe floor. The method is to partially sink the bathroom floor by 300 mm, and the sinking part is filled with cement coke. The drainage branch pipe of this layer is laid in the bathroom cushion of this floor, and it is better to install the side wall floor drain at the surface of the sinking floor, so that even Pipe leaks occur and water is drained from the side wall drain. The above measures not only increase the flexibility of the layout of the sanitary ware during the second renovation, but also solve the leakage problem of the bathroom, and can also avoid the neighborhood contradiction caused by the water leakage on the upper and lower floors, and can effectively reduce the noise of the drainage plastic pipe.

The drainage transverse pipe in the pipeline conversion layer adopts a flexible connection flaring water supply plastic pipe. In the design of water supply and drainage in buildings, it is often necessary to encounter a number of risers that are collected in a horizontally suspended pipe suspended in a ceiling. According to the requirements of the specification, the horizontal trunk pipe should be set according to the design expansion and contraction amount. However, the expansion joints provided on the horizontal trunk pipe are prone to water leakage, and the common drainage UPVC pipe wall is thin, brittle, and has a large noise. Therefore, the drain pipe in the pipe conversion layer is preferably replaced with a flexible connection flaring water supply plastic. The pipe has a thick wall, high strength, impact resistance, low noise, and because the interface is a flexible connection, it is not necessary to install a telescopic joint, and is also shock-resistant, which can effectively prevent leakage at the pipe joint. Many people now use the drainage cast iron pipe or the feed water cast iron pipe in the pipeline conversion layer. The cast iron pipe is self-contained, the inner surface is not smooth, it is easy to block, and the installation is inconvenient. The effect is not as good as the flexible connection of the flared water supply plastic. Well managed.

The building materials products in the market are mixed, and the design institute should give full play to the advantages of information resources and assist the construction unit to select suitable products with reliable quality.

The use of a slow-closing silencer to replace the ordinary swing-type check valve on the water outlet pipe of the pump can eliminate or reduce the damage of the water hammer to the water supply pipe. Hollow bricks should not be used for sanitary partition walls. Hollow bricks will enlarge the leakage area and affect the installation of sanitary ware and water heaters.

Although UPVC pipes have experienced such problems during the promotion and use, their advantages are more and more accepted. As long as the manufacturer closes the quality of the product and develops more new products; the construction unit strengthens the construction management and improves the installation quality; strictly controls the design and inspection, and believes that the use of the water supply and drainage UP-VC pipe will bring more and more Economic and social benefits.