Hello everyone, I just recently got a house with a pool. I have no knowledge whatsoever to take care of one so to take some worries off my head, I decide to hire a contractor to maintain the pool for me. However, they would sometime request changes that I'm not quite sure if it's necessary or if there is a way to reduce the cost of material and installation. This is one example recently. They want to install a vacuum line where the red circle is in the picture included. Can someone please help to enlighten me about this and how can I reduce the cost if I really need to install one? Thank you so much for your help!