In single vault systems, all elements are in one vault. Flows enter the device from the endwall, top, or either side wall at the front, pass through the treatment elements, and then exit out the back of the device through the endwall, or either side wall. The various sizes of our single vault devices are shown below. In some areas, some models are not available; however, other sizes may be available. The flows shown are the maximum conveyance flows (design storm). Please contact our engineering department for water quality treatment flows, which can vary based on local rules.