Your Flowtec is a lawn sprinkler pump, not a well pump! Meaning it pumps lots of water from a lake. These pumps are designed for flow but not pressure.
You should have a Jet Pump for a well. Using a sand point I would have recommended using no more than a 1/2 jet pump (3/4 hp max.). You are getting air bubbles because you are sucking air somewhere (probably at the top of the well point at 14') or your pump is gravitating (it may sound like it has sand in it).
If you want to continue using your existing pump (and no pressure) you will have to restrict the flow from the pump to a point where there are no bubbles in the return water, possibly drive several points at least 10 ft. apart and manifold them all together (keeping in mind you will get more flow but little pressure for sprinkler heads).
Or install a 1/2 to 3/4 hp. jet pump to the existing well and check for flow (and air bubbles). Restrict the output flow to where you see little or no bubbles. OR drive more sand points some distance apart and manifold them together.
NOTES: Do what works best for you. . .
Washing the 3" PVC to the top of the water sand, then driving the point into the water bearing sand as far as possible works best in our area.
[LIST]Don't overpump the point, to do so sometimes impacts the fine sand around the well point and restricts the flow.
Master Ground Water Consultant