What's the best way to drain your a/c pipes from ur central basement unit? My a/c pan is filled wit Water.?

-sounds like the hose that carries the water out is clogged find the hose and run a wire thru itYou can hook up a 'Little Giant' condensation pump. They're 110v, completely contained, operate on a float switch, with a check valve in the drain the water won't run back into the pump. I used to use these pumps in a factory to remove condensation, I had to use model # VCL-45ULS item # 553240, there are less expensive models but I had to use this one because it had to pump the condensation up to the ceiling (30ft) then to an outside wall (usually about another 50ft) This is the strongest condensation pump I could find. It's very low maintenance, just plug it in and leave it alone!
If you use a shop vac be sure to take the filter out. Also check and see if there is a condensate pump that is supposed to empty the pan. It may have burned out or, as said before the hose could be clogged.
Shop vac is the answer. Even a mini will do if you have to buy one.