Deep Root Irrigation LLC (DRI) 75 Sky Oaks Dr. P.O. Box 114 , Angwin , California 94508 USA About Solutions products Publications videos Companies Deep Root Irrigation LLC (DRI) Products Model DRI-18 - Deep Root Irrigation Units Model DRI-18 - Deep Root Irrigation Units 0 Share DRI-18 is an 18 inch Deep Root Irrigation device used primarily for irrigating large shade trees. Most popular related searches root irrigation deep root irrigation rooting irrigator shade tree tree irrigation How does it work? Videos related to this product Installation Video This is a instructional video on how to install the DRI. Customer reviews No reviews were found for Model DRI-18 - Deep Root Irrigation Units. Be the first to review! Add your review Publish your review Great! review successfully added!