Following a column about sequential distribution a few months ago, I have received some comments and questions about installation and operation of drop boxes for effluent distribution to sewage treatment trenches. I thought it would be a good idea to focus specifically on the boxes themselves and reiterate their use in sequential distribution at the same time.
A drop box has an inlet for the supply line pipe from the septic tank or previous trench, two potential outlets at the bottom of the box which connect to the supply pipe to the trench and an outlet that will connect to
