Hello.
I recently bought a house with an inground pool. I am learning as I go, but the current issue seems to be poor suction when vacuuming. I have a 20 by 40 pool with a 1.5hp pump (very new). The sand filter is in good condition and has newer sand in it (last year). When the pool runs on 'filter', the pressure going into the skimmers looks fine. You can see water flowing into it, as the basket collects leaves etc. My issue is when I vacuum the pool, I seem to get weak/no suction. I end up just moving debri around, rather than vacuuming it up.
Setting up the vacuum:
Remove all air from the vacuum hose (new hose this year). Attach hose to triangle vacuum piece and pole, while keeping it under water. Then I make sure my vacuum plate is over the skimmer basket. Then I cover vacuum head with my hand and attach it to the vacuum plate real quick, so I don't allow air in. Then when I put my hand under water by the triangle vacuum piece, I barely feel suction. I feel the same suction whether I run waste or filter. What am I missing? All I do is move particles around under water, rather than suck them into the hose line.