Ok, so I’ve taken over the maintenance of my pool myself. I have a question about vacuuming the pool. I have ordered a 30’ hose and a vacuuming head. My robot vacuum connects to the side of the pool via a two-piece valve (LETRO) that fastens with a push and a quarter turn. I assume this is where I am to connect my vacuum hose, correct? If so, how does the hose fit into this connection? Is there a fitting that I will need to purchase also?