· Wide range of sizes, shapes and color options offered by manufacturers.

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Resistance to most negative impacts, such as absolute inertness with respect to most aggressive chemical compounds contained in the atmosphere. In addition, polymers are not subject to oxidation when exposed to moisture, atmospheric oxygen and temperature, which guarantees absolute corrosion resistance of the systems. They are also not subject to biological destruction by microorganisms and fungi.
Light weight, which allows using a minimum of personnel when installing such systems.
Ease of installation, which is usually carried out with a minimum of fastening parts. The use of rubber seals and adhesives simplifies and speeds up the process.

Polymer systems of internal storm sewerage also have the student data typical for most plastic structures:
Partial loss of properties under various types of climatic influences. High and low temperatures and their differences have a particularly strong effect on plastic drainage systems. When significantly heated, the parts of the structure can lose shape, and when cooled, they become brittle. In addition, products made of some plastics, such as polyethylene, do not tolerate solar radiation well due to the destructive effects of ultraviolet rays.
Low maintainability. If plastic parts are damaged, the only repair option is most often its replacement, which can be a serious problem when using adhesive installation.
One of the main advantages for the user is the low price of plastic systems.

Metal drainage systems
Metal systems of internal storm sewerage are made of galvanized sheet steel, carbon steel with a protective coating (external and internal) of powder paint or polymer films or thin sheets of copper.
Copper storm drains win over other options in terms of operational indicators, but are significantly more expensive, which is why they have not become widespread, and are mainly used in design and restoration solutions when it is necessary to preserve the original appearance of the building or emphasize its exclusivity.

Elements of drainage systems made of steel with a protective coating have gained wide popularity due to a set of undeniable advantages:
the mechanical strength of such products allows them to withstand significant loads, for example, during heavy rainfalls, heavy snowfalls or gusty winds.