The stone reservoir must meet both runoff storage and structural support requirements.
The stone reservoir must meet both runoff storage and structural support requirements.
The bottom of the reservoir should be level so that water infiltrates evenly. If the system is not designed for infiltration, the bottom should slope at 1 - 5% toward the underdrain.
The bottom of the reservoir should be level so that water infiltrates evenly.<br>
If the system is not designed for infiltration, the bottom should slope at 1 - 5% toward the underdrain.