DC Journeyman Plumber (302) The DC Journeyman Plumber (302) credential serves the region’s commercial and residential construction sectors, where code compliance and system integrity directly shape project timelines and occupant safety. Maryland plumbing code nuances? from vent stack sizing to backflow prevention requirements? feature prominently, reflecting real-world DC metro construction standards that inspectors enforce rigorously.
| Exam Name | DC Journeyman Plumber |
| Exam Code | 302 |
| Format | PDF & Practice Test Engine |
| Target Year | 2026 Updated |
| Features | 100% Verified Q&As |
