i have a shop located right in Carver,ma. Your whole problem might evolve around the dutc taped joint. If there arent any threads on the well for a fitting you can get a water tight well head that will keep you from drawing air. If you are content on driving another point you do not want to be driving a check valve into the ground. You also dont want a mesh screen. I would go with a stainless steel slotted well screen for your new well.If you plan on drawing from both points,i would move atleast 10 feet so the new point doesn't have an influence on the old one. If you are not too sure about the condition of the material you are driving the point in,I would go with a 10 slot screen. You can get all this material from North East Water Well in Carver, MA. The guy that owns the place is from Quincy too and i buy all my material from him.