I have an in-ground pool with 2 skimmers and 3 returns and 3 deck jets. I've seen pools with dedicated pool vacuum ports. Can something like this be retrofitted by adding a tee to main drain intake with a shut off valve? Then connect vacuum hose to it to vacuum? Never had good luck maintaining suction thru skimmers and looking for a fix. Does this make sense? This is my first visit to this forum and it looks very informative. I appreciate any help with this issue.