Which building sewer is designed to convey storm water or drainage without sewage?

The building sewer specifically designed to convey stormwater or drainage without sewage is identified as the storm sewer. This system is capable of handling rainwater runoff and surface drainage, directing it away from buildings and into appropriate drainage systems or natural bodies of water.

Storm sewers are essential in preventing flooding and managing stormwater effectively, separating it from sanitary sewage. This distinction is critical because sanitary sewers are intended exclusively for the conveyance of wastewater from bathrooms, kitchens, and other plumbing fixtures that produce sewage. Cesspools and combination fixtures have different functions; cesspools are used for the disposal of sewage, while combination fixtures handle both water and sewage, which is not their primary purpose.

Understanding the purpose and functionality of storm sewers is vital for effective plumbing and drainage management, as they play a key role in environmental protection and infrastructure integrity.