I have a buried 1000 gal oil tank and the fill pipe is a straight nipple which was cracked (car hit it!) I replaced the nipple, but i got water in my tank! Had a rain storm and I have quite a bit of water in there. I'ved tried using a drill pump, but got nowhere. Have been draining through the fuel pump at burner, but again, there's a lot of water. Any suggestions would be greatly appreciated.