Pre manufactured septic grave
Drawing labels, details, and other text information extracted from the CAD file (Translated from Spanish):
stone layer, gravel layer, dust coat, elbow, Well of, absorption, screw cap of plg., top, departure, reels, of pet, concrete template, filtration chamber, reinforced concrete slab cm, natural terrain, entry, sedimentation chamber, tube of, top, ventilation, septic tank prefabricated, natural terrain