Surely many of my readers have noticed or know that there are sewer pipes of different colors. These are mainly four shades:
Yellow, gray, black and white! Each pipe has its own disadvantages and advantages.
Gray pipe very common as it has good physical properties at a low price. This type of pipe is made from polypropylene. It is worth noting that almost all plastic pressure pipes are also made of it, the material is able to withstand high temperatures up to 90 degrees. Short-term 95 ° C. Apartment owners sometimes pour freshly prepared boiling water down the drain to clear the grease plugs and try to remove odors in this way. And this pipe can withstand such loads.
In addition, an important aspect of this pipe is its high chemical resistance. It is poured into the sewer without getting, alkalis and acids, the advantage of the pipe is obvious. Accordingly, gray sewer pipes are laid inside the room where such temperature conditions can occur.
The fat minus of this pipe is the lack of frost resistance and low strength compared to PVC or Polyethylene pipes. Therefore, it is not recommended to lay them outside the building.
White pipe for sewage, it is also made of polypropylene, respectively, it has the same excellent properties. But unlike gray, it has a good appearance. It is more aesthetically pleasing to lay them in an open way. Sometimes they are performed in a sound-absorbing version. But this advantage is reflected in the price, it is two times higher than the gray one.
Black pipe is made of polyethylene, it was widely used for laying sewage in premises in the early 90s-2000s. Like polypropylene, it has good physical properties of resistance to alkalis and acids. But when the temperature in the pipe exceeds 60 degrees, it becomes soft and sags on the supports. Which is reflected in the quality of the connections. Often, the joints of such pipes begin to leak. As our plumbers say about this pipe, it "dries up" over time. That is, the diameter of the pipe changes. That subsequently does not allow connecting newer pipes of normal diameter to it. At negative temperatures, they slightly change their strength characteristics. That allows them to be used at low temperatures. It is possible to use them when arranging pipelines outside buildings. Because the strength of polyethylene is high.
The orange (red) pipe is made of PVC plastic and has excellent mechanical strength. Usually, such a pipe has an increased plastic thickness from 3 to 4 mm. The maximum operating temperature is up to sixty degrees. That does not allow it to be used in the layout of residential premises. But at the same time, at low, negative temperatures, they practically do not change their strength characteristics, in contrast to polypropylene. Therefore, PVC pipes are often used in laying pipelines in frozen soils and outside buildings.
To organize the information from the article, I made a table, I was not too lazy. Click on the table, it will enlarge.
Respectfully, Timofey Mikhailov. Plumber.