For some of our projects where spatial limitations might perclude the installation of an above ground cistern sometimes a below ground collection system and tank might be the best option. Personally, for these applications we tend to favor a system that was devised by Xerxes that features their fiberglass tank and accessories. The nice thing about designing a system with Xerxes is that that will prefabricate the tank to fit your specific requirements. For instance, if you want to install a manway access hatch and have them build in a ladder that is something that they can do right in their factory. Also, they can build in areas for you to tie in your intake lines and overflow piping and can even provide connections for a sump if that is desired. Below is a schematic diagram prepared by Xerxes and a construction drawing for one of our projects that illustrates some of the components that you might find in an underground system. If you have any questions or require any design guidance or a quotation for the installation of a system of this sort please feel free to drop us a line.