| 1501 | Ductile Iron Butterfly Valves | Company Product |
| 1502 | Ductile Iron Castings | Company Product |
| 1503 | Ductile Iron Circular Manhole Covers | Company Product |
| 1504 | Ductile Iron Circular Manhole Frames | Company Product |
| 1505 | Ductile Iron Double Flanged Spring Loaded Silent Check Valves | Company Product |
| 1506 | Ductile Iron Gate Valves | Company Product |
| 1507 | Ductile Iron Heavy Duty Air Tight Manhole Covers | Company Product |
| 1508 | Ductile Iron Heavy Duty Air Tight Manhole Frames | Company Product |
| 1509 | Ductile Iron Heavy Duty Airtight Watertight Recessed Manhole Covers & Frame | Company Product |
| 1510 | Ductile Iron Heavy Duty Manhole Covers | Company Product |
| 1511 | Ductile Iron Heavy Duty Manhole Frames | Company Product |
| 1512 | Ductile Iron Heavy Duty Recessed Manhole Covers | Company Product |
| 1513 | Ductile Iron Heavy Duty Recessed Manhole Frames | Company Product |
| 1514 | Ductile Iron Heavy Duty Water Tight Manhole Covers | Company Product |
| 1515 | Ductile Iron Heavy Duty Water Tight Manhole Frames | Company Product |
| 1516 | Ductile Iron Manhole Covers & Frame | Company Product |
| 1517 | Ductile Iron Medium Duty Manhole Covers | Company Product |
| 1518 | Ductile Iron Medium Duty Manhole Frames | Company Product |
| 1519 | Ductile Iron Medium Duty Recessed Manhole Covers | Company Product |
| 1520 | Ductile Iron Medium Duty Recessed Manhole Frames | Company Product |
| 1521 | Ductile Iron Pipes | Company Product |
| 1522 | Ductile Iron Silent Check Valves | Company Product |
| 1523 | Ductile Iron Spring Check Valves | Company Product |
| 1524 | Ductile Iron Spring Loaded Bypass Silent Check Valves | Company Product |
| 1525 | Ductile Iron Swing Check Valves | Company Product |
| 1526 | Ductile Iron Twin Fold Waffle Check Valve | Company Product |
| 1527 | Ductile Iron Uni-Ckeck Valves | Company Product |
| 1528 | Ductile Iron Valves | Company Product |
| 1529 | Ducting | Company Product |
| 1530 | Ducting Contractors | Company Product |