Water Drain Systems Drain With Cover 600 x 300 x 200mm Also available in 300 x 300 x 200mm U-Shape Drain 635 x 570 x 500mm Man Hole Cover and Frame Storm Water Drain Slabs Made in Wet pressed with vacuumed dewatering system. Available in Light, Medium and Heavy Duty Applications. Coping Stone Concrete Road Hump Retainer Wall