21. Ball valves in sizes up to 2 inch generally come in single piece, two or three piece designs.22. Ball valves are durable, performing well after many cycles, and reliable, closing securely even after long periods of disuse.23. It also features a race-car-like fueling system with a roller-ball valve opening for the nozzle but no gas cap. 24. If a sample is taken using a ball valve , the valve has to be flushed before the sample is taken. 25. Two piece ball valves are generally slightly reduced ( or standard ) bore, they can be either throw-away or repairable. 26. One disadvantage of a ball valve is that they trap water in the center cavity while in the closed position. 27. An ice plug is set on top of the ball valve to protect it, the cans atop the ice plug. 28. Filling the windshield washer tank was done by a capless ball valve, right next to the capless gas tank ball valve . 29. Filling the windshield washer tank was done by a capless ball valve , right next to the capless gas tank ball valve. 30. "With a ball valve , you won't be sitting on that beach in Antigua wondering whether you turned the water off completely,"
