How it works:

• Septic tank effluent flows into the first trench until effluent levels rise and the trench reaches capacity
• The effluent flows into the second trench until it too reaches capacity, then into the third as required.
• Trenches function independently, each receiving effluent at the rate it is accepted in that trench.

Key Benefits:

• Drop boxes can be used on level or sloping sites
• Can be used on steeper slopes than most other distribution methods
• No maximum slope limit
• Simple and efficient distribution
• Quick and easy inspection of boxes
• No standing effluent in solid pipe between septic tank & drop boxes
• Can be used for effluent sampling
• No need for even trench lengths