Hello my fellow G's

I want to replace all my heater hoses and bleeder valve. I bought these three things:
https://www.z1motorsports.com/z1-pro...et-p-5202.html
https://www.z1motorsports.com/z1-pro...e-p-11190.html
https://www.z1motorsports.com/water-...ps-p-9395.html

My question is, how many (if any) of these do I need: https://www.dormanproducts.com/p-10052-56438.aspx
If I don't want to re-use any OEM plastic couplers currently in place?

I really thank you for your advice!