Ok, guess it's time for me to reiterate my advice on vacuuming a pool with 2 or more suctions 8)
Get the vacuum set up with all suction lines open, then start closing valves to the lines you aren't vacuuming through until the pressure gauge drops 1/2 - 1 psi. This gives you good suction while not making the vachead stick to the floor! If you have gravel or other large debris on the floor, vacuum the rest of the pool and then turn off all other ports that you aren't vacuuming through and lift the vachead and lower it onto the rock (you may need to rapidly work the vachead back and forth to liberate the rock - you need to dislodge it from the bottom to allow the suction to pull it into the suction port on the vacuum - then, if the rock is too large to enter the hose, pull the vachead up to ~ 4" below the pool surface and remove the stuck rock with your hand) [I caught s**t for one time telling a customer, who had told me "I tried vacuuming up the rocks, but the won't get them, so don't even TRY the vacuum, you'll have to go in and pick them off the floor by hand!", "Lady, maybe
you can't, but I know how to use a pool vacuum and
I can" :lol: - needless to say, the rocks were out of the pool in 3 minutes & I didn't even get wet up to my elbow
]
Technique and knowing how, and when, to adjust the amount of suction are the keys to properly vacuuming a pool 8)