I have been trying to determine to close my pool with a Shop Vac. Last year the company I hired did it this way. I was unable to be there to see how it was done. I have a pump, sand filter and a heater. I know to lower the water below the intake water spot by about 6 inches, and to remove the little plug on the sand filter on the bottom and to remove the pumps little basket. In the skimmer to remove the basket. I am not sure where to start using the shop vac to blow out the lines and the heater. Any help would be great.