Hey acidstars
The way that a Python or a vac connected to a faucet works is by the Venturi effect. It's the same as how powerheads suck in air.
Basically, you connect everything up to the faucet, put the end of the tube in your tank, and turn your facet with the super pump in the down position (when you get one, you'll understand what that means). The water flowing down past the siphon tube into sink causes a suction effect on your siphon tube. If that's confusing, learn more about the
Venturi effect.
The pump in the down position draws the water from your tank into the sink, even against gravity, due to the Venturi effect.
Then, you add water condition to your tank. You put the pump into the up position, which doesn't let the water down the drain, but instead pushes it into the tube, into your tank.
With this setup, you don't have to worry about starting or stopping the siphon or the effects of gravity.
Hope that helps.
Oh, and if you make your own, you can find the correct adapters to connect the tube to the super pump, and to connect the super pump to the faucet. Thomas says he's seen a kit at our LFS that has the super pump and all the fitting you need, just no tubing. I can get the correct tubing at my local hardware store for 69¢ per foot.