| Year | 1993 |
| Date | 15-Oct |
| Volume | 171 |
| Issue | 3,955 |
| Page | 480 |
| Category | Pump |
| Part | 5 |
| Title | Southworth Duplex Boiler Feed Pump |
| Author | John Bertinat |
| Notes | Describes the water pump components. Water pump valve chest, upper valve plate, valve cover or force chamber, water pump valves |