What is the minimum pitch required for a house sewer line?

The minimum pitch required for a house sewer line is 1/4" per foot. This specification ensures that wastewater flows effectively through the piping system by utilizing gravity, minimizing the risk of clogs and backups. A slope that is too steep may lead to wastewater flowing too quickly, potentially causing solids to settle out of the flow, which can create blockages. Conversely, a slope that is too shallow may not provide enough gradient to facilitate proper drainage, resulting in stagnant water within the pipes. Therefore, a pitch of 1/4" per foot is the optimal angle recommended for standard residential sewer lines to maintain efficient operation and prevent plumbing issues.