| PSI | Pounds per Square Inch |
| GPM | Gallons per Minute |
| LPM | Liters per Minute |
| BTU | British Thermal Unit |
| Lbs | U.S. Pounds |
| Ft. Head | Foot pounds of head pressure |
| g | Grams |
| kg | Kilograms |
| CU | Cubic or Cubed diamentional measurement |
| HP | Horse Power |
| KW | Kilowatt |
| cm | Centimeter |
| mm | Millimeter |
| L | Liters |
| oz | Ounces |
| BTU/Hr | GPM x 500 x Change in H20 Temperature |