Building Water and Sewerage Network Projects

Building Water and Sewerage Network Projects

Building water and sewerage network projects are essential for any urban intervention that impacts water supply or wastewater drainage networks. These projects aim to ensure safe and efficient water supply, as well as proper wastewater drainage, and must be submitted to the competent authorities for both new constructions and rehabilitations.

 

Documentation and Regulation

The projects include technical documents (written and drawn) submitted during licensing or prior communication.

They are carried out in accordance with Decree-Law No. 23/95 and standard EN 806-3.

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Wastewater Drainage Network

Designed according to normative standards, including calculations for diameters and flow.

Uses formulas that consider material roughness and pipe flow.

Specific guidelines in the regulation ensure the efficient operation of risers and collectors.

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Water Supply Network

The network is designed to meet consumption needs and pressures at the points of use.

The hydraulic dimensioning takes into account consumption demands and energy requirements for water heating.

Follows the guidelines in the EPAL building network manual.

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Materials Used

• PVC: Popular for its resistance to corrosion, low cost, and ease of installation.

• PEAD (High-Density Polyethylene): Flexible and impact-resistant, ideal for underground installations.

• Galvanized Steel: Resistant, but subject to internal corrosion. Commonly used in external or non-embedded installations.

Hot water branches must be thermally insulated to prevent heat loss.

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Professional Qualifications

Only engineers or technical engineers recognized by the Order of Engineers and the National Association of Technical Engineers can prepare the projects.

Qualifications must be appropriate to the complexity and nature of the project.

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Tests and Trials on Site

After installation, a hydraulic test (pressure test) is carried out for 24 hours to check the tightness and pressure of the installation.

Passing the test allows the work to proceed to the next stage, including closing the trenches and continuing the construction.