The SUF plastic vent valve with a 3/4 inch male thread is ideal for large systems with variable height terrain such as agricultural land and golf courses. It is used to vent air pockets and allows the system to be vented after irrigation has ended, particularly suitable for ROOTGUARD underground irrigation. The valves are easy to dismantle and clean and can be installed either above ground or in valve shafts. Place them at the highest points of the pipes for optimal performance. The color finish is black/green.