Inch and a quarter(I.D.) is common. Should be the thread size of the hand pump. If you are going to put a shallow well electric or gas pump on it I would go to 2". And put a pvc caseing around it. Auger is far as you can, drop in the caseing (3" or 4"
, put the point and as much pipe as you can into the caseing and drive pipe till you get 2 or 3 feet of water over the point. Put your hand pump on and pump till the water clears up. terry<img src=icon_smile_clown.gif border=0 align=middle>
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