It's no secret both Lowes and Home Depot get their propane tanks supplied by Blue Rhino and Amerigas. Well, these two companies only fill their tanks to 15.0 lbs., or about 3/4 only! Not only is that a rip-off, it is forcing people to change-out their tanks more frequently causing more gas driving to and from the store. I recommend getting a Grill Gauge (grillgauge.com) and use it to verify your tanks are correctly filled to the maximum DOT allowable levels!!!