William 
Ethanol will mix with the water and allow it to burn with the gas in your tank.  Use gas line antifreeze  or look for a bottle of ethanol.  Gas blended with ethanol is available at gas stations in many areas.
Good luck.
George
'85 Westfalia

  
>>Isn't there a product that will get rid of water in the gas tank? I remember
>>Stan Wilder mentioning such a product available at any FLAPS.