Yup, and Aqueous Accumulators is the way to go.
However I use build craft pumps with a 3x3 1 deep pool of water with the pump hovering above the water in the middle and it works fine.
If you want to change your user names like you did in vanilla Minecraft you can copy all the Tekkit mods, core mods, and configs to your Minecraft and the name change will work.