Where should branch connections NOT be connected to stack offsets?

In plumbing design, branch connections to stack offsets must be carefully considered to ensure proper flow and prevent potential problems such as clogs or backflows. The option indicating that branch connections should not be made at the horizontal offset close to the stack is correct. This is because connecting a branch near the horizontal offset can disrupt the intended flow dynamics and lead to issues like noise, turbulence, or waste getting trapped due to improper drainage gradient.

When branch connections are made further down the stack or in locations designed to maintain a consistent flow direction and gradient, it allows waste and fluid to move more effectively toward the stack's main line. This alignment with the flow direction is crucial for maintaining the system's functionality and preventing any adverse effects associated with improper drainage.

Other options might suggest locations for branch connections that could be more feasible from a flow perspective or offer better results in waste drainage, contributing to the overall efficiency of the plumbing system being designed.