Plumbing CofQ Prep
Plumbing Code Exam Practice
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Preparing for your Plumber CofQ? Practice exam-style questions, improve your plumbing knowledge, and build confidence with Plumbing CofQ Prep!
Walk into your plumbing Certificate of Qualification exam knowing the material and the Code, not just hoping you studied the right things.
Plumbing CofQ Prep is built for Canadian plumbing apprentices preparing for the CofQ and Red Seal plumber exam. You get 782 multiple-choice practice questions across 13 core trade topics. Answer one at a time and get a clear explanation after every question.
CODE-BACKED EXPLANATIONS
Every answer comes with a practical explanation, and 306 questions cite the exact National Plumbing Code (NPC 2020) article. You learn why an answer is right and where to find it in the Code, which builds the lookup skills you need on exam day.
13 TRADE TOPICS
Study drainage and venting, water distribution, backflow prevention, gas, hydronics, code, and more. Questions are written around the work plumbers actually do, so studying reinforces what you see on the job.
FULL CofQ EXAM SIMULATION
Take a timed 125-question exam with a 4-hour clock and a 70% pass mark, modelled on the real test format. When you finish, step through every question you missed, one at a time, with your answer, the correct answer, and the explanation side by side.
MOCK EXAMS AND CODE DRILLS
Short on time? Run a 30-question mock exam with a pace timer set to real exam speed, or sharpen your Code navigation with the 306-question Code Reference Drill, which covers every Code-cited question. Topic quizzes let you focus on one subject at a time, and targeted review brings your weak topics back until they stick.
TRACK YOUR READINESS
The Progress tab shows your overall exam readiness, how many questions you have mastered, and your mastery level for each topic. A daily study streak helps you stay consistent through your apprenticeship.
TRY IT FREE
Start with the free 7-question Express Quiz any time, and take one full 30-question Mock Exam free. Unlock the full question bank, exam simulation, mock exams, and drills with a Premium 3-month subscription, which includes a 3-day free trial.
Subscription details: Payment is charged to your Apple ID account at confirmation of purchase after the free trial ends. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel your subscription in your App Store account settings.
Plumbing CofQ Prep is an independent study tool. It is not affiliated with or endorsed by any government, the Red Seal program, or the National Research Council of Canada. Results depend on your own preparation.
Put in the reps and study with the Code at your side. Download Plumbing CofQ Prep and start preparing today.
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What's new in 1.0.3:
• New questions, including backflow protection for steam boiler blow-down tanks and hot water recirculation
• Every answer reviewed: corrected and clarified several questions, including medical gas colour codes updated to the Canadian CSA standard
• Removed a duplicate question
• Now 782 questions with 306 Code citations
The developer, ANGEL RUIZ HERRERA, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ANGEL RUIZ HERRERA
- Size
- 11 MB
- Category
- Education
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Plumbing Solutions by AR