It is a small tiroles outlet and a small reservoir with clarifier for use of rural housing
Drawing labels, details, and other text information extracted from the CAD file (Translated from Spanish):
Water channel, metal lid, your B. Pvc sap, Concrete fc esp., Esp., Slab bottom esp., faith., Fc background, Fc lid, Technical specifications, Minimal overlaps, Wall covering, Water channel, Shredder, Reservoir, metal lid, Sole