1. Wrap waterproof tape around the threads of the elbow's inlet

2. Tighten it securely to the inlet of the overflow tank

3. Install the pump outlet and connect the threaded pipe

4. Place the spillway box at the appropriate height along the edge of the pond.

5. Make sure to place it flat. Otherwise, the water flow will be uneven.

6. Arrange the plastic sheeting to conform to the surrounding terrain.