Warm weather is right around the corner and that means more opportunities to barbecue. And this year that might mean replacing your the propane tank on your grill. By April first all gas bar-b-ques will need a new valve on their propane tank. The new safety valve will better prevent leaks that could cause explosions. The overfilling protection device shuts off the flow of gas after the tank reaches 80 percent capacity. This new regulation means that dealers will no longer be able to fill your old tanks, but a new valve for you tank will only run around eleven dollars.