The horizontal retention tanks can be installed at the final point of the system for storage and can be customized with baffles, pumping stations, and pressurization to meet specific needs. Baffles can be installed in the tanks to slow down the water flow and increase settling time, ensuring that solids settle to the bottom and do not accumulate at the outlet. Pumping stations can also be added to ensure effluent is discharged at the required flow rate.

Pipework placement is also critical for efficiency of the retention systems. The pipework can be installed to direct water flow and enhance the retention time.

Additionally, pressurization can be utilized to maximize the available space in the retention tank, enabling the storage of higher volumes of stormwater or wastewater.