Are tees allowed for inlet and outlet devices?

Tees are indeed allowed for inlet and outlet devices in certain applications within the context of onsite sewage facilities (OSSF). Inlet and outlet tees serve an important purpose by aiding in the flow of wastewater and facilitating proper dispersion within the treatment system. Their design helps to minimize turbulence and ensures that the flow is evenly distributed, which is crucial for the effective treatment of sewage.

In many systems, especially those dealing with septic tanks or similar setups, tees are strategically placed to maintain the right hydraulic conditions. They often play a role in protecting the system from solids being carried over into the outlet or from scum layers affecting the inlet flow, which is critical for the system’s efficiency.

While other options reference restrictions or specific conditions regarding the use of tees, the correct understanding is that tees can be designed and used appropriately in various sewage systems, indicating that their adoption is compliant with industry practices and standards.