In home decoration and construction projects, PVC drain pipes are like the "blood vessels" of the drainage system - choose the right size, and the drainage will be smooth; if you choose a small one, it will be easy to block, and if you choose a large one, it will be wasteful. But in the face of models such as "De50" and "De110" on the market, many people have made it difficult: What size pipe should be used in the bathroom for home improvement? What size should be selected for the main drainage of the project community? Today, organize the specifications of PVC drain pipes commonly used in home improvement and engineering into a clear comparison table to help you understand at one time.

First clarify a little common sense: the specifications of PVC drain pipes usually use "De" to indicate the outer diameter (for example, De50 is 50 mm). This is a common way of marking in the industry. Just look for this when buying pipes.

home decoration commonly used PVC drain pipe specifications

home decoration drainage scene is relatively single, commonly used on the three kinds of pipe diameter, focusing on the pipe diameter, wall thickness and applicable scenarios:

- De50 (outer diameter 50mm): wall thickness is generally 2.0-2. 5mm, suitable for small water drainage - such as sink, balcony floor drain, vegetable basin branch pipe. This kind of scene instant displacement is small, 50 pipes can just meet, will not take up too much space.

- De75 (outer diameter 75mm): wall thickness 2.2-2. 8mm, is the "main pipe" of the kitchen and bathroom. For example, the main drainage of the kitchen (even the vegetable basin + dishwasher), the bathroom shower area of the floor drain main pipe, with 75 pipes can deal with the situation of water at the same time, to avoid water accumulation.

- De110 (outer diameter 110mm): wall thickness 2.8-3, is the "standard" of toilet drainage! Because the toilet instant displacement can reach 1.6-2 L/s, only 110 pipes can be quickly discharged; In addition, the main drain pipe of the bathroom (connecting toilet + shower + sink) is also recommended to use 110 pipes to prevent congestion when multiple water points are drained at the same time.

project commonly used PVC drain pipe specifications

project scene displacement is larger, need thicker pipes, commonly used is 160mm and above pipe diameter:

- De160 (outer diameter 160mm): wall thickness 3.2-4 mm, suitable for community unit sewage supervisor, commercial building toilet riser. For example, in a 10-story residential building, the main drainage riser of each unit uses 160 pipes, which can carry the drainage of the entire floor.

- De200 (outer diameter 200mm): wall thickness 4.0-5 mm, used for the main drainage pipe of the community and the drainage supervisor of the underground garage. This kind of scene requires the collection of drainage from multiple units, and the flow of 200 pipes is larger, which is not easy to block.

- De250 and above (De250, De315, etc.): wall thickness 5.0mm or more, mainly used in urban road drainage, fire drainage in large shopping malls or sewage supervisors in industrial parks. This type of project has a large displacement, and large pipe diameters must be used to ensure drainage efficiency.

Pipe selection tips

1. Look at the wall thickness: home decoration is recommended to choose a wall thickness of 2.5mm (more durable), the project is 3.2mm (strong pressure resistance);

2. Choose according to the scene: the toilet must use 110 pipes, the kitchen is recommended to be more than 75 pipes, the project selection should refer to the design flow (such as the main drainage of the community to calculate the total number of households);

3. Length problem: PVC pipes are generally 4 meters/root, some manufacturers have 6 meters, construction can be cut according to need, do not be afraid of too long or too short.

In fact, the choice of PVC drain pipe is not so complicated - first see where to use, then look for the pipe diameter of the table, and finally confirm that the wall thickness meets the requirements, basically not wrong. Whether it is a home improvement toilet or a project to do community drainage, according to this logic, the drainage system can be used for decades.