Yes, that should work but davidstcldfl is closer to what I build. It is hard to get started unless you have two people or a plug. What I do is have a hard pipe going down to the sump from the T. I put a cork in it at the lower end and fill the line with water through the stand pipe. Put a plug in the stand pipe and remove the plug from the sump end. This should start the siphon. Once that happens you can pull the plug out of the stand pipe and start letting water into the tank.