Hello guys , Pool newb here. I’m trying to understand my Pool set up here specifically whether the main drains are actually working right now. I have a pool/spa setup with an intelliflo vsp for the pool/spa and whisperflo for 3 sheer descents. It’s Pentair equipment with automation. I wanted to test the main drains by turning skimmer off and pulling all suctions towards main drains but I am not exactly sure how. Builder told me he set it up for 50/50 main drain and skimmer suction. Based on the picture can you guys tell me which valve is for what ? Please excuse the weeds I need to get to those. Thanks in advance.