These valves are available to set up your own plumbed system for a large aviary using your parts or to change out valves on your existing Bird Butlers or pipe system. The valves come pre-wrapped with tape and are ready to screw in. The large stainless steel valve is designed specifically for the larger parrots. It stands up to punishment from Congo Greys, large Amazons, Macaws, and Cockatoos. Has 1/2" male pipe thread. Price is for valve ONLY.