The 24 in. X 12 in. corrugated pipe comes connected to the SedimenTrap™ device used with 18 in. (SC-18) StormChamber® systems. The SedimenTrap device with pipe is placed into the 5 ft. X 5 ft. X 5 ft. excavated hole, with the pipe corrugation exposed above the height of the stone base. The SedimenTrap device with pipe works as a filtration system to capture sediments in captured stormwater runoff; recommended use, at minimum, is placement of one SedimenTrap device in the first StormChamber unit and one device in the final chamber or row.