What happens next?

How to vacuum your pool and backwash the filter
Turn off skimmers as noted on pipes.
Start by attaching the vacuum hose to the vacuum head.
Flood hose with water before placing adapter in skimmer to avoid loss of prime.

OPT: *Connect system to waterline blast hose to water pipe. Attach bucket to pouring spout (always, don't run the water spout). *Remove openings you cannot reach by inserting adapter prongs into the openings. Remove screws from skimmer and filter. *Connect the skimmer chain to pull slide and enlarge the front drain if diyer does not cover the bottom of the filter Leave the home without using the skimmer chain. Ensure back drain turns are on minimum, and no water leaks out of spigot. *Some skimmers require you to remove the basket before you can attach the hose, so be sure to do this if necessary. Holding one end of the vacuum line over the return port is a good way to bleed out the air trapped in the line.
Some skimmers require you to remove the basket before you can attach the hose, so be sure to do this if necessary. Holding one end of the vacuum line over the return port is a good way to bleed out the air trapped in the line.