There is a very thin, flexible black hose that ties into two different above ground PVC pipes for my pool pump. The plastic connection between the hose and the PVC pipe (shown in the picture) has cracked and my pool plumbing can no longer keep pressure. I would like to get this part replaced but I don't even know where to start.
Can someone explain the purpose of this hose and where I can find the replacement parts?

Can someone explain the purpose of this hose and where I can find the replacement parts?
