DE Plumber study plan
DE Plumber · Give each week a clear focus.
8 weeks · About 6 hours per week
Plumbing Trade Knowledge and Practice & Plumbing Code and Regulation
Map the Domain 1 and Domain 2 exam blueprints into a written topic checklist with weights
Define and write out the 25 most common plumbing terms and fixture/drainage vocabulary from memory
Diagnose the layout logic of a DWV system by sketching a two-bathroom house stack and branch diagram
Locate the code sections that govern drainage slope, venting, and trap arm length in your adopted plumbing code
Your checkpoint
A one-page blueprint map plus a labeled hand-drawn DWV sketch with code citations
Plumbing Trade Knowledge and Practice & Plumbing Code and Regulation
Calculate pipe sizing and fixture-unit loads for a sample single-family dwelling
Compare water supply distribution methods (manifold vs trunk-and-branch) and state where each is code-compliant
Explain venting types (individual, common, wet, stack, air admittance) and match each to an application
Identify the code requirements for trap seals, cleanouts, and backflow prevention
Your checkpoint
A worked sizing worksheet showing fixture units, developed length, and selected pipe sizes with code references
Plumbing Trade Knowledge and Practice & Plumbing Code and Regulation
Assemble a personal code index of the 40 most testable sections with plain-language summaries
Apply code rules to three realistic scenarios (remodel, addition, commercial restroom) and justify each decision
Distinguish permit, inspection, and licensing requirements from installation standards
Practice 40 mixed Domain 1-2 questions and log every miss with the underlying rule
Your checkpoint
A 40-entry code index and an error log classifying each missed question by root cause
Plumbing Trade Knowledge and Practice & Plumbing Code and Regulation & Safety and Health
Re-test all previously missed Domain 1-2 items until each is answered correctly twice
Explain the hierarchy of plumbing code adoption, amendments, and local authority having jurisdiction
Identify the safety hazards tied to each major plumbing task (soldering, confined spaces, trenching, chemical drain work)
Match personal protective equipment to specific tasks and cite the relevant safety standard
Your checkpoint
A hazard-to-PPE matrix covering at least 10 plumbing tasks
Safety and Health
Describe confined space entry procedures, atmospheric testing, and rescue planning for a sewer vault scenario
Explain trenching and excavation protective systems and the soil classification that drives them
Outline lockout/tagout and electrical safety steps before servicing a pump or water heater
Summarize lead, asbestos, and sewer gas exposure controls relevant to service work
Your checkpoint
A written job hazard analysis for a sewer line repair, including controls and emergency response
Safety and Health & Business and Project Management
Build a safety inspection checklist for a small plumbing crew and apply it to a mock jobsite
Calculate a loaded labor rate from wage, burden, overhead, and profit targets
Prepare a takeoff and estimate for a residential repipe using unit costs and a markup strategy
Draft a project schedule with sequencing, inspections, and material lead times
Your checkpoint
A complete mock bid package: takeoff, estimate, schedule, and safety checklist
Business and Project Management
Explain contract types, change order handling, and lien/retainage basics for plumbing subcontracts
Describe how to read a set of construction drawings and coordinate with other trades
Outline licensing, insurance, and recordkeeping obligations for a plumbing business
Practice 40 mixed Domain 3-4 questions and log misses by root cause
Your checkpoint
A one-page change-order process flowchart plus a Domain 3-4 error log
Plumbing Trade Knowledge and Practice & Plumbing Code and Regulation & Safety and Health & Business and Project Management
Complete two full-length timed practice exams under test-day conditions
Review every missed item across all domains and close gaps with targeted code lookups
Recite key formulas, pipe sizing rules, and safety thresholds from memory
Finalize a test-day plan covering timing, guessing strategy, and logistics
Your checkpoint
A final readiness report with both practice scores, remaining weak areas, and a one-page test-day plan
Milestones
Week 2: Can size a residential DWV and water system and cite the governing code sections without notes
Week 4: Scores 70% or better on a 40-question mixed Domain 1-2 set and can explain every miss
Week 6: Produces a defensible bid package and a hazard analysis that a supervisor would accept
Week 8: Scores 80% or better on both full-length timed practice exams with no domain below 70%