The Waterway 640-4770 V is an 18″ x 18″ pool grate and frame, VGB-compliant to facilitate safe drainage. It features durable construction with a total open area of 174.4 square inches and a frame size of 19.5″ x 19.5″. The unit supports a floor flow rate of up to 740 GPM, making it suitable for high-capacity drainage applications in pool and spa systems.








