Illinois Licensed Plumber Exam Prep

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Official sitting

Confirm question count, time, open-book rules, and passing score on the live board bulletin before you sit. We do not guarantee a passing result.

What’s included

18,000+ word study guide

Worked calculations, code-section breakdowns, exam traps, a key-terms glossary and a 30/60/90-day plan.

4 full-length practice exams

Original questions weighted to match the topic mix of the real exam.

400 practice questions

Every one with a written explanation and the code section behind the answer.

Same study guide and four exams on every term. You are choosing how long you can log in.

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What this prep covers

  1. IDPH Plumbing Program and the Licensed Plumber credential
  2. Official exam structure (750.310)
  3. How 77 Ill. Adm. Code 890 is organized
  4. Plumbing math
  5. Subpart A — definitions and general
  6. Materials, joints, traps, interceptors (Subparts B–E)
  7. Fixtures (Subpart F)
  8. Water supply (Subpart I) — published Illinois numbers
  9. Drainage and vents (Subparts J and K)
  10. Indirect waste, hangers, tests (Subparts G, H, M)
  11. Drawing portion strategy
  12. Practical portion
  13. 225 ILCS 320 on the knowledge assessment
  14. Worked calculations
  15. Sample questions
  16. Mistakes that fail this exam

…and 14 further sections in the full guide.

Illinois Licensed Plumber exam — common questions

How much practice does this prep include?

It includes 4 full-length practice exams and 400 practice questions in total. Every question has a written explanation naming the code section the answer comes from.

How long is the study guide?

The Illinois Licensed Plumber guide runs to roughly 18,153 words, covering 30 sections from licensing rules through worked calculations and solved exam questions.

How long do I get access?

Choose 30, 60 or 90 days at checkout. Access begins the moment you enrol, works on any device, and you can retake every practice exam as often as you like. Days remaining are shown in your dashboard and you can extend at any time.

Is this an official Illinois Licensed Plumber exam?

No. This is independent preparation material. It is not affiliated with or endorsed by any state licensing board or exam vendor, and it does not contain real exam questions. Always confirm current requirements with your licensing board.

About this Illinois Licensed Plumber prep

This prep is built specifically for the Illinois Licensed Plumber examination and includes a 18,000+-word study guide written for this exam, 4 full-length practice exams and 400 practice questions, each with a written explanation.

Topics covered

  • IDPH Plumbing Program and the Licensed Plumber credential
  • Official exam structure (750.310)
  • How 77 Ill. Adm. Code 890 is organized
  • Plumbing math
  • Subpart A — definitions and general
  • Materials, joints, traps, interceptors (Subparts B–E)
  • Fixtures (Subpart F)
  • Water supply (Subpart I) — published Illinois numbers
  • Drainage and vents (Subparts J and K)
  • Indirect waste, hangers, tests (Subparts G, H, M)
  • Drawing portion strategy
  • Practical portion
  • 225 ILCS 320 on the knowledge assessment
  • Worked calculations
  • Sample questions
  • Mistakes that fail this exam
  • Glossary
  • Eight-week study plan
  • Exam day
  • Subpart I and Appendix A — finishing the water and drain tables

How access works

You are paying for access length (30, 60, or 90 days). The study guide and four timed exams are the same on every term. Access starts when you enrol and works on any device for that term.

Not affiliated with or endorsed by any state licensing board or exam vendor. For exam-preparation purposes only.