My pool finally got cool enough to close this weekend. The returns and the skimmers blew out ok, so I think I'm good there. (My pump and valves are all inside an unheated building).
The previous owners had a length of PVP pipe that they placed into the suction port of the skimmer, which is also covered by the winter cover. Is this sufficient, or is there something extra I should do?
Also, someone posted (Waste, I believe) that to winterize the main drain you pressurize it with air until it bubbles for a few minutes and then shut the valve to it with the air still applied. I tried to do this with a 4.25hp 150mph shop vac and I couldn't get even a single bubble out of the main drain. Any suggestions?