Mistakes Every Apprentice Makes (and How to Avoid Them)
Starting your plumbing apprenticeship is exciting—but let’s face it, it’s also a steep learning curve. While hands-on experience is invaluable, most new apprentices make the same avoidable mistakes early on. The good news? Knowing what these common slip-ups are can save you from wasting time, damaging your reputation, or risking safety.
At PlumbersHQ, we’re committed to helping the next generation of Aussie tradies thrive. Whether you’re learning the ropes or just passed your first year, here’s a breakdown of the most common mistakes plumbing apprentices make—and how you can avoid them.
1. Arriving Unprepared for the Job
The Mistake:
One of the most frustrating things for a licensed plumber or supervisor is when an apprentice shows up to a job site without the right tools or proper gear. This signals a lack of initiative and slows everyone down.
How to Avoid It:
Before each day, ask your mentor or supervisor what tasks are planned. Then check your toolkit. Essentials every apprentice should carry include:
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Adjustable wrench
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Tape measure
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Pipe cutter
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Plumber’s tape
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Torch and solder
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Safety gear (gloves, glasses, boots)
Need to gear up? Check out our Apprentice Starter Kit at PlumbersHQ—packed with reliable tools to help you hit the ground running.
2. Not Asking Enough Questions
The Mistake:
Some apprentices stay silent, worried they'll look incompetent. Unfortunately, this often leads to mistakes or unsafe practices.
How to Avoid It:
Remember: your job is to learn. Asking questions shows that you’re invested in improving. Experienced plumbers would much rather explain something than fix a botched job later. Don’t be afraid to speak up when you’re unsure.
3. Ignoring Safety Protocols
The Mistake:
Skipping PPE, rushing through confined spaces, or ignoring lockout/tagout procedures can result in serious injuries. Apprentices may feel pressure to move fast—but shortcuts can be dangerous.
How to Avoid It:
Always prioritise safety over speed. Familiarise yourself with basic plumbing site safety, including:
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Working in trenches or confined spaces
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Ladder safety
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Electrical and gas awareness
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Using power tools correctly
Need to brush up? Consider enrolling in a construction safety course or reviewing WorkSafe VIC’s safety regulations.
4. Forgetting to Double-Check Work
The Mistake:
It’s tempting to assume a connection is sealed or a valve is off—only to find out (too late) that you missed something. A single oversight can lead to costly water damage or dangerous leaks.
How to Avoid It:
Before moving on, double-check every job:
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Is every fitting tight?
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Is the water or gas turned off before disconnecting?
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Did you test the system under pressure?
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Are all tools and materials packed away?
Take pride in your work. Triple-checking now means fewer call-backs later.
5. Lacking Basic Plumbing Theory
The Mistake:
Some apprentices focus solely on hands-on work and neglect the technical knowledge that supports it. Without theory, you may not fully understand why certain systems behave the way they do.
How to Avoid It:
Study alongside your TAFE or RTO coursework. Understand:
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The different pipe types and where to use them
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Drainage fall rates and pipe sizing
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Backflow prevention
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Venting systems
PlumbersHQ recommends investing in a solid plumbing handbook or guide you can keep on site for quick reference.
6. Poor Communication Skills
The Mistake:
Not listening carefully, failing to follow instructions, or having a bad attitude can reflect poorly on you—especially in front of customers.
How to Avoid It:
Plumbing is a team sport. Whether you're communicating with supervisors or customers:
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Be clear and respectful
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Repeat instructions to confirm understanding
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Take notes if needed
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Maintain a polite and professional tone
Even simple habits like turning up on time and saying “thank you” go a long way.
7. Using the Wrong Tool for the Job
The Mistake:
Using makeshift tools or forcing the wrong-sized wrench can damage fittings, cost you time, and signal inexperience.
How to Avoid It:
Get to know your tools inside and out. Invest in the right gear and learn how to use each properly. A few must-haves for apprentices:
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Multi-bit screwdriver
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Basin wrench
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Deburring tool
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Spirit level
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Pipe inspection camera (if your budget allows)
Need help choosing? Our team at PlumbersHQ is happy to recommend tools based on your trade level.
8. Not Keeping Track of Jobs or Tasks
The Mistake:
Forgetting what you were asked to do or misplacing work orders can cause serious delays.
How to Avoid It:
Use a simple notepad or a task-tracking app like Trello or Google Keep to log instructions, appointments, or materials needed. When you're new, it's hard to remember everything—so write it down.
9. Disrespecting the Trade
The Mistake:
Treating plumbing like “just a job” can affect your growth and relationships in the industry. Some apprentices make the mistake of thinking they know better after a few months.
How to Avoid It:
Respect the skills, knowledge, and challenges that come with the trade. Stay humble and hungry. Learn from every job, and appreciate that plumbing is essential work—you’re helping homes, hospitals, businesses, and the whole community run smoothly.
10. Ignoring Customer Etiquette
The Mistake:
Apprentices sometimes forget they’re in someone’s home or business. Leaving muddy footprints, using inappropriate language, or being too casual can leave a bad impression.
How to Avoid It:
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Always knock and introduce yourself
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Wear clean boots or shoe covers inside
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Be polite and avoid slang in customer-facing conversations
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Clean up after yourself, even if you’re “just the apprentice”
Customers often judge the whole plumbing company based on your behaviour—so represent yourself (and your employer) well.
Bonus Tip: Not Using PlumbersHQ as a Resource
The Mistake:
Trying to go it alone when you’ve got a whole support network ready to help.
How to Avoid It:
PlumbersHQ isn’t just a store—we’re a community built for Australian plumbers. Whether you need:
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Reliable tools at trade prices
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Expert guidance on fittings and materials
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Educational resources or gear bundles
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Help finding plumbing courses or licences in your area
We’ve got your back. Visit PlumbersHQ.com.au and join our mailing list for updates, tips, and special offers.