Personally, I used my gast Roc-R pump with a tire valve in the top of the siphon pipe to draw water in. I also used a 4" test plug in the outlet to hold the water until filled and the pulled the plug.

Oh ya, I used a clear "Whole House" filter between the pump and the pipe to see when it pulled water so it didn't ruin the pump. The filter had a shutoff valve that I closed when I saw water enter the filter.