Washington D.C. Journeyman Master Plumber Certification Exam

Washington D.C. Journeyman Master Plumber Pressure drop calculations across fittings, trap seal heights, and venting configurations dominate this exam. You’ll need to distinguish between wet vents, vent stacks, and island fixture arrangements while applying D.C.’s specific amendments to the International Plumbing Code. Code compliance questions often trip up test-takers unfamiliar with local variance tables and inspector enforcement patterns.