Dreaming of a stable, hands-on career with strong job security and earning potential? You’re not alone—many people in Ontario are turning to skilled trades like plumbing. But if you’re wondering, “How do I become a plumber in Ontario?”, you’ve come to the right place. This guide walks you through every step—from training and apprenticeships to certification—so you can launch your plumbing career with confidence.
What Does a Plumber Do in Ontario?
Before diving into the “how,” it helps to understand the “what.” Plumbers in Ontario install, repair, and maintain pipes, fixtures, and systems that carry water, gas, and waste in residential, commercial, and industrial settings. Their work ensures clean water supply, safe sanitation, and compliance with Ontario’s strict building codes.
According to Ontario’s Ministry of Labour, Immigration, Training and Skills Development, plumbing is one of the most in-demand skilled trades in the province, with over 1,800 job openings projected annually through 2028 due to retirements and infrastructure growth.
Step-by-Step: How to Become a Plumber in Ontario
1. Meet the Basic Eligibility Requirements
To start your plumbing journey in Ontario, you must:
- Be at least 16 years old
- Have a Grade 12 diploma (or equivalent), preferably with credits in math, science, and English
- Be a Canadian citizen, permanent resident, or hold a valid work permit
No prior plumbing experience is required—most plumbers begin as apprentices.
2. Enroll in an Ontario-Certified Plumbing Program (Optional but Recommended)
While not mandatory, completing a pre-apprenticeship plumbing program at a publicly funded college (like George Brown College or Fanshawe College) gives you a competitive edge. These 1- to 2-year programs cover:
- Pipefitting fundamentals
- Blueprint reading
- Ontario Building Code basics
- Safety protocols (including WHMIS and working at heights)
Many programs include job placement assistance and count toward your apprenticeship hours.
3. Register as an Apprentice with the Ontario College of Trades (Now Skilled Trades Ontario)
As of 2022, the Ontario College of Trades was replaced by Skilled Trades Ontario (STO)—the new regulatory body for trades. To become a registered apprentice:
- Find an employer sponsor (a licensed plumbing contractor who agrees to train you)
- Apply online through the Skilled Trades Ontario portal
- Sign a Registered Training Agreement (RTA)
💡 Tip: Use the Skilled Trades Ontario Job Board or attend job fairs to connect with employers.
4. Complete Your Apprenticeship (5,760 Hours Total)
Your apprenticeship typically takes 4–5 years and includes:
- 5,760 hours of on-the-job training (paid work under a certified journeyperson)
- 720 hours of in-school training (delivered in 3 levels of 8-week blocks)
During this time, you’ll learn:
- Drain-waste-vent (DWV) systems
- Water supply installation
- Gas piping (with additional certification)
- Backflow prevention
- Local plumbing codes and inspections
You’ll earn while you learn—apprentice wages in Ontario start around $18–$22/hour and increase with experience.
5. Pass the Certificate of Qualification (C of Q) Exam
Once you complete your hours and in-school training, you’re eligible to write the Plumbing (306A) Certificate of Qualification exam. This provincial exam tests your knowledge of:
- Ontario plumbing regulations
- Safety standards
- Practical troubleshooting
- Code compliance (based on the Ontario Building Code)
The exam has 125 multiple-choice questions and lasts 4 hours. You need a 70% to pass.
Upon passing, you become a Certified Journeyperson Plumber—eligible to work independently anywhere in Ontario.
6. Consider Voluntary Red Seal Endorsement (For National Mobility)
While not required in Ontario, earning the Red Seal endorsement allows you to work anywhere in Canada without re-certifying. To qualify, you must:
- Hold your Ontario C of Q
- Pass the Red Seal Plumbing exam (similar content, national standards)
Over 85% of Canadian plumbers hold Red Seal status, making it a smart career move if you plan to work across provinces. Learn more about the Red Seal Program on Wikipedia .
How Much Do Plumbers Make in Ontario?
Plumbing is one of Ontario’s highest-paying skilled trades. According to Job Bank Canada (2025 data):
| Apprentice (Year 1) | $18 – $22 | $37,000 – $45,000 |
| Apprentice (Year 4) | $28 – $32 | $58,000 – $66,000 |
| Certified Journeyperson | $35 – $45+ | $72,000 – $95,000+ |
| Master Plumber / Owner | $50 – $80+ | $100,000 – $150,000+ |
Many plumbers also earn overtime, emergency call-out bonuses, and benefits (especially in unionized roles).
Pros and Cons of Becoming a Plumber in Ontario
| High demand & job security | Physically demanding work |
| No student loan debt (earn while you learn) | Irregular hours (emergencies) |
| Path to self-employment | Initial apprentice wages are modest |
| Strong union support (e.g., UA Local 46) | Requires ongoing code updates |
Despite the challenges, 92% of Ontario plumbers report high job satisfaction (2024 Skilled Trades Survey).
FAQ: How Do I Become a Plumber in Ontario?
Q1: Do I need a license to work as a plumber in Ontario?
A: Yes. You must hold a Certificate of Qualification (C of Q) in Plumbing (306A) to work legally as a journeyperson. Apprentices can work under supervision without a full license.
Q2: How long does it take to become a plumber in Ontario?
A: Typically 4 to 5 years, including apprenticeship hours and in-school training. Accelerated paths (e.g., through pre-apprenticeship programs) may shorten this slightly.
Q3: Can I become a plumber without going to college?
A: Yes. You can find an employer sponsor directly and register as an apprentice without formal college training—though pre-apprenticeship programs improve your chances of being hired.
Q4: Is plumbing a Red Seal trade in Ontario?
A: Yes. Plumbing is a Red Seal trade, meaning you can apply for the Red Seal endorsement after obtaining your Ontario C of Q. This enhances your mobility across Canada.
Q5: What’s the difference between a plumber and a pipefitter?
A: Plumbers focus on water, gas, and drainage systems in buildings. Pipefitters work with high-pressure systems (e.g., steam, chemicals) in industrial settings. They require separate certifications in Ontario.
Q6: Are there union opportunities for plumbers in Ontario?
A: Yes. Many plumbers join UA Local 46 (United Association) or other skilled trade unions, which offer better wages, benefits, and job protection.
Final Thoughts
Becoming a plumber in Ontario is a smart career move in a growing, recession-resistant industry. With clear steps—from apprenticeship to certification—and strong earning potential, this trade offers both financial stability and personal fulfillment.
If you’re ready to turn your passion for problem-solving into a lifelong career, start by researching local apprenticeship sponsors or pre-apprenticeship programs today.
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