What is the minimum slope required for the house sewer pipe per foot?

The minimum slope required for the house sewer pipe is 1/8 fall per foot. This slope is designed to ensure that wastewater flows effectively through the pipe. If the slope is too shallow, it could lead to sluggish flow, increased risk of clogs, and potential buildup of solids within the pipe. A slope of 1/8 fall is generally considered optimal for maintaining adequate velocity of the wastewater, preventing sedimentation and ensuring that the system operates efficiently.

While a slope of 1/4 could provide a more rapid flow, it may also result in excessive velocity that can cause turbulence, leading to potential wear on the pipe and disconnection at joints. Slopes steeper than 1/8 might also create problems with noise and backpressure. Therefore, 1/8 fall per foot strikes a balance between effective drainage and overall system integrity, ensuring the proper function of the on-site sewage facility.