If you're near Elk Grove Village, Service Fire and Equipment at 1485 Landmeier is a great little place. I just got my 15 lb. tank filled for $20 out the door. Fast and friendly!
Thanks for spreading the word about Service Fire and Equipment! Just got back from there and picked up my 15 lb. tank. The fill was $20 out the door and the guy was very helpful. I won't go anywhere else. Cheers!