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Easy installation, resistance to compressive and corrosion forces, light weight and reduction of purchase and installation costs of double-walled polyethylene fittings and durability and long service life of this type of fittings have made this type of fittings welcome in sewerage projects. The variety of double-walled polyethylene connections, the development of the water supply network has accelerated the implementation of sewerage projects and increased the quality of its implementation.

For example, it can be said that mm polyurethane sewage polyethylene pipe has a ring resistance of . kN and double-walled polyethylene corrugated pipe with a size of mm has a ring resistance of , . and kg. Is Newton. It is interesting to know that pipes with dimensions of mm and above have only a ring pressure of . kN and are thus designed only for installation in larger projects.

Carogit pipes are produced in different sizes in the form of Carogit pipes and Carogit spiral pipes, which in fact only the production method is different in that in the production of Carogit pipes, polyethylene material is molded and pressed in one piece, but in the production of pipes. Spiral carogit production method is very different. In this method, the profiles or the protrusions on the pipe are cooled by the extruder that produces the pipe profiles after cooling and passing through the water inside the tub, and it is gradually rolled in a spiral and glued together by a series of interactions. After gluing the inner layer of the tube, which is yellow, it sits on the inner wall of the tube and on the profiles and is glued on the tube by defined high pressure pulleys. These pipes are usually produced in high sizes, ie from to . The sizes of corrugated and spiral corrugated pipes are:

Carogit pipes are usually used in the transfer of sewage and fluids that are transferred by gravity and fluid transfer is designed without internal pressure. Due to the fact that corrugated pipes do not have internal load pressure, it means that the fluid passing through these pipes does not have internal load pressure, and these pipes are practically responsible for transferring liquid fluids as an underground atmosphere. Usually, this type of pipe has a maximum They can withstand internal pressure of . times. This type of pipe is offered in two types with couplers and without couplers. The size of corrugated pipes is available in the non-coupler type from to mm and in the coupler type from to mm.