Note: Changing the laying slope on the branch (horizontal) pipeline section is not permitted.

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17.1. Wastewater drainage should be provided through closed gravity pipelines.

Note: Industrial wastewater that does not have an unpleasant odor and does not emit harmful gases and vapors, if this is required by technological necessity, may be discharged through open gravity channels with a common hydraulic seal.

17.2. Sections of the sewer network should be laid in a chinese student data line. The direction of the sewer pipeline should be changed and devices should be connected using connecting parts.


17.3. The installation of indents on sewer risers is not permitted if sanitary devices are connected below the indents.

17.4. To connect branch pipes located under the ceiling of rooms, in basements and technical undergrounds to the riser, oblique crosses and tees should be provided.

17.5. Two-way connection of drain pipes from bathtubs to one riser at one elevation is permitted only with the use of oblique crosses. It is not permitted to connect sanitary devices located in different apartments on one floor to one drain pipeline.

17.6. It is not permitted to use straight crosspieces when they are located in a horizontal plane.

17.7. For sewerage systems, taking into account the requirements of strength, corrosion resistance, and savings in consumables, it is necessary to provide the following pipes:

for gravity systems - cast iron, asbestos-cement, concrete, reinforced concrete, plastic, glass;

for pressure systems - pressure cast iron, reinforced concrete, plastic, asbestos-cement.

17.8. Pipeline connecting parts should be accepted in accordance with current state standards and technical conditions.