Deploy cover as a preventative measure to seal drains before washdowns, maintenance, or other cleanup tasks that may allow contaminants into nearby water systems. Features easy-open push plug for filling with standard water hose. Order a cover size that overlaps drain opening at least 6-in (152-mm) on each edge. To prevent edges from losing contact with ground surface, do not fill over 5-in (127-mm) in height. Long-lasting durable EnGuard™V, Modified PVC coated fabric construction resists damage