MTP 49A is the bare bone Chloride pump for Model 30A-Plus Kit, formerly Model 18A, which was introduced to the American Agricultural market over 18 years ago, many of the pumps sold then are still in service. Thousands of 30A’s have followed since this introduction. If you believe all pumps are the same, then you haven’t tried a"Wonder Pump" Put a Wonder Pump to work for you, compare, you will see the difference from the first tire filled