Delta 4980145 Water Supply Elbow - Chrome. The 4980145 is a genuine product manufactured by Delta Faucet Company. This particular product is a Water Supply Elbow in a Chrome finish. The Supply Elbow is for shower applications and is specifically for use with shower items such as Hand Showers. It mounts directly to the shower wall with a threaded outlet facing downward allowing for a shower hose and hand shower to be attached.