| PLMB | 104 | 13 | Plastic & Copper Pipe Tube Fittings | Optional: Plumbing Level I | 9780137933839 | | NCCER | 2025 | SPRING |
| PLMB | 104 | 13 | Plastic & Copper Pipe Tube Fittings | Optional: IPC 2021 International Plumbing Code | 9781609839628 | | ICC | 2025 | SPRING |
| PLMB | 104 | 21 | Plastic & Copper Pipe Tube Fittings | Optional: Plumbing Level I | 9780137933839 | | NCCER | 2025 | SPRING |
| PLMB | 104 | 21 | Plastic & Copper Pipe Tube Fittings | Optional: IPC 2021 International Plumbing Code | 9781609839628 | | ICC | 2025 | SPRING |