Ok so I got my new part in today. The quality is great and the neck swivels so I can position this in any position I want. It was pricey $120 but if it works it will be worth it! Once installed this will be how I will fill my system and it has an overflow outlet built into it as well. It is aluminum and comes with the gasket and cap.
Q: Does the overflow tank have to be the highest point or just outlet for the overflow line from this part?