An underground infiltration crate for collecting, detaining, infiltrating, and storing grey water, rainwater, and/or storm water, may include a plurality of large plates attached to a plurality of small plates engaged to form a crate with tubular members positioned therein, wherein each tubular member is secured between a pair of large plates. Each of the large plates may be a framed panel that includes a four-sided periphery formed of a top periphery wall, a bottom periphery wall, and two side periphery walls; alternating parallel channels extending between the top periphery wall and the bottom periphery wall; at least one aperture extending through each of the alternating parallel channels; and at least one built in fitting integrated into the framed panel, wherein the built in fitting may be a ring-shaped groove that is sized to friction fit a tubular member therein.