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What is the required coverage depth for building sewers connected to a public sewer?

  1. 18 inches

  2. 24 inches

  3. 30 inches

  4. 36 inches

The correct answer is: 36 inches

The required coverage depth for building sewers connected to a public sewer is typically designed to ensure that the sewer lines are adequately protected from environmental factors such as frost and surface loads. A depth of 36 inches is commonly specified to provide this level of protection, especially in regions where frost can penetrate the ground. This coverage helps to prevent the freezing of pipes, which can lead to blockages or damage, as well as safeguards them from potential surface disruptions such as traffic. Maintaining this depth is critical for ensuring the long-term functionality and integrity of the sewer system, minimizing the risk of leaks or failures, and adhering to local regulations and building codes designed to protect public health and safety.