This 6-in. plastic single outlet basin is part of the Bullet Pit(MC) system by Reln. It's stabilizing lock-down feet will prevent movement during installation while its round interior not only facilitate water circulation but also cleaning the unit. This product can be snapped to a 3 in. or 4 in. corrugated pipe or glued to a PVC variant of the same sizes. This drainage system is ideal of low-lying zones such as large lawn spaces, gardens or landscaped areas. This product is backed by a 1-year limited warranty.