yes that upper float valve is agnled a bit, cus if you rotate it to a normal angle it will kick off soon with a lower waterline, this is all right. the only tubing issue you would have is the drilled elbow that belongs in the res, other than that you can use lengths to siut your needs. you can test your float valves by running the unit to fill and with your hand lift the upper float switch, if it shuts off your incoming water then its good. you can also test your outgoing drain floats by moving your timer passed the fill cycle to drain and play with the switch, if you lift the switch up it should still be pumping, you will learn fast. just make sure you have the elbow with the hole in it inside the res on the fill pump, hole facing down, if not for this hole through the cyphon effect your fill pump will be activated as normal and shut off as normal but the vacuum can still pump water thruogh thus emptying your res, since this would happen during a fill cycle your drain pumps will not be automatically activated till the timer passes the fill cycle, after the fill cycle the drain pump will pump anything left in your buckets back regardless of the timer---this pump will always work unless your segment timer tells it to fill. i am lucky to never have flooded my rooms in this fashion.......i manage to flood the whole joint by other means xD