100+ Free DE Plumber Practice Questions
Pass your Delaware Journeyman Plumber License Exam exam on the first try — instant access, no signup required.
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Key Facts: DE Plumber Exam
70%
Passing Score
Division of Professional Regulation
80
Questions
3 hours time limit
~$215
Exam Fee
PSI
IPC
Code Basis
Delaware adopts the International Plumbing Code (IPC) with state-specific amendments
Delaware's journeyman plumber exam has approximately a 60% pass rate. The 80-question exam requires 70% to pass and is based on the IPC. Delaware adopts the International Plumbing Code (IPC) with state-specific amendments.
About the DE Plumber Exam
The Delaware journeyman plumber exam is administered by PSI on behalf of the Division of Professional Regulation. The exam is administered by PSI on behalf of the Delaware Division of Professional Regulation. It tests knowledge of the IPC, drainage systems, water supply, venting, gas piping, and Delaware-specific amendments.
Questions
80 scored questions
Time Limit
3 hours
Passing Score
70%
Exam Fee
~$215 (Division of Professional Regulation)
DE Plumber Exam Content Outline
Drainage, Waste & Vent Systems
IPC drain sizing, fixture units, slope requirements, cleanouts, trap seals, and DWV installation per Delaware amendments
Water Supply & Distribution
Pipe sizing, backflow prevention, cross-connection control, water heaters, pressure regulation, and T&P relief requirements
Venting Systems
Vent sizing, wet venting, circuit venting, air admittance valves, vent termination per the IPC
Gas Piping & Appliances
Gas pipe sizing, BTU calculations, pressure testing, appliance venting, and combustion air requirements
Code Administration & Materials
Permits, inspections, approved materials, joint methods, pipe supports, and Delaware-specific rules
How to Pass the DE Plumber Exam
What You Need to Know
- Passing score: 70%
- Exam length: 80 questions
- Time limit: 3 hours
- Exam fee: ~$215
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
DE Plumber Study Tips from Top Performers
Frequently Asked Questions
What plumbing code does Delaware use?
Delaware adopts the International Plumbing Code (IPC) with state-specific amendments. The Division of Professional Regulation oversees all licensing requirements. The exam is based on the current adopted IPC edition.
How many questions are on the Delaware plumber exam?
The Delaware journeyman plumber exam has approximately 80 multiple-choice questions with a time limit of 3 hours. A score of 70% is required to pass.
Who administers the Delaware plumber exam?
The exam is administered by PSI on behalf of the Division of Professional Regulation. You must apply through the agency and schedule your exam through PSI's testing system.
What experience is required for the Delaware journeyman plumber exam?
Completion of plumbing apprenticeship (typically 4 years) or equivalent documented experience under a licensed plumber. Contact the Division of Professional Regulation for specific requirements and application procedures.