Blow out winterizing question

I also blow my lines out and once I had broken pipes to replace, so then I blew them out and put in anti freeze. no broken pipes. so on my new tt there is no room under the cabinet to install the by pass valve so I blew it out and am hoping for the best. I did watch a video on u tube and the guy said to blow the pipes out and turn the pump on and the air would suck the water out of the pump and down the drain. So I re-blew the pipes out and turned on the pump. I hope he knows what he's talking about. I am going to re think this out and by next winter I hope to have a solution to this pump thing.