It should be ...the most important thing is you have to have a backup chamber...just in case, any wine gets in that pump, its done....
you are way better off, buying a system that is all ready tried and true.
I am a big do it yourselfer...Its not worth the time spend to build a system with a capacitor,vacuumpump,on and off switch,overflow, etc.
when one is built that works,tried and tested.