How much pitch on a sewer drain?

The pitch on a sewer drain, typically referred to as the drain slope, should generally be between 1% to 2% (or 1/8 to 1/4 inch per foot) to ensure proper flow and prevent clogs. This slope allows for efficient drainage by utilizing gravity to move wastewater through the pipes. Local building codes may specify exact requirements, so it's important to check those as well. Proper installation is crucial for maintaining the functionality and longevity of the drainage system.