Plumbing Recruitment Red Flags: Common Mistakes Plumbing Businesses Make When Recruiting (and How to Avoid Them)

About the Author: Ashley Thomson
Ashley Thomson

Recruiting for a plumbing business isn’t simply about hiring a few workers to fill positions; it encompasses the broader objective of building a strong, capable team that is motivated to drive long-term growth and success for the organisation. Every individual role within the team contributes unique value to the business as a whole, ensuring not only smooth operations but also fostering financial stability and promoting a high level of customer satisfaction, which is essential in maintaining a positive reputation in the industry.

Apprentices bring fresh energy and learning potential, laying the groundwork for future skilled tradespeople. Qualified plumbers guarantee high-quality workmanship, reliability, and technical expertise. Supervisors and project managers oversee operations, guide teams, and maintain efficiency, which is critical for those seeking business coaching for plumbers to refine leadership skills and strategic management. Estimators and coordinators ensure financial accuracy, job planning, and workflow, promoting profitability and seamless execution.

Hiring the right people for each stage of your plumbing firm’s growth is crucial to building a strong and sustainable business. Many owners seek guidance from a plumbing business coach to enhance their hiring strategy, ensuring each role contributes to efficiency, profitability, and team culture. However, recruitment mistakes can lead to delays, subpar work quality, and workplace tensions, ultimately impacting the overall success of the business.

To make informed hiring decisions, it’s essential to look beyond qualifications and assess a candidate’s attitude, leadership ability, and adaptability. Identifying common mistakes and recognising red flags early can prevent costly setbacks, ensuring your team is built for long-term growth and stability. Here is what to watch for when recruiting across different roles in your plumbing firm.

Common mistakes and red flags to avoid when hiring for each role on your Plumbing Firm Career Progression Map

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🚫 Mistakes To Avoid & Red Flags in Plumbing Recruitment

— by role, with specific insights to help you spot issues early.

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🧱 Apprentice Plumber

❌ Common Mistakes:

  • Hiring based on enthusiasm alone, without checking follow-through or discipline.
  • Overlooking communication skills (“they’re just on the tools”)—this slows development.
  • Not checking practical aptitude—some struggle with the physical/logical demands.

🔺 Red Flags:

  1. Minimal interest in learning the trade – e.g., vague reason for wanting to be a plumber.
  2. Poor listening or eye contact in the interview – shows possible challenges on-site.
  3. Unable to explain how they’ve handled instructions or routines in past roles/school – can indicate low teachability.

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🛠️ Qualified Plumber (Tradesperson)

❌ Common Mistakes:

  • Hiring on ticket alone without testing workmanship or attitude.
  • Not assessing fit with your systems (job app use, reporting).
  • Assuming they’re ready for field independence—many still need mentoring.

🔺 Red Flags:

  1. Talks down about past employers without accountability – suggests a blame mindset.
  2. “I just like to be left alone” – might resist teamwork or supervision.
  3. Sloppy or vague trade test/work history – indicates potential quality or pride issues.

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🔧 Leading Hand / Crew Supervisor

❌ Common Mistakes:

  • Promoting your best tradesperson without assessing leadership capability.
  • Hiring externally without checking team fit—can create pushback from crew.
  • Failing to test decision-making under time pressure.

🔺 Red Flags:

  1. Can’t describe how they’ve dealt with conflict on site – signals poor team leadership potential.
  2. Dominates the conversation but avoids specifics – may lack substance behind confidence.
  3. No clear examples of past delegation or team coordination – watch for lone wolf types.

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🧰 Site Supervisor / Project Foreman

❌ Common Mistakes:

  • Prioritising trade skills over planning and communication ability.
  • Ignoring digital competency (schedules, compliance tools).
  • Overvaluing personality fit with builder instead of job delivery discipline.

🔺 Red Flags:

  1. Downplays paperwork or admin as “not my thing” – job requires detailed documentation.
  2. Can’t walk through a timeline from rough-in to handover – gaps in job management.
  3. Says “I just chase the team and get it done” – reactive, not strategic.

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🏗️ Estimator / Project Coordinator

❌ Common Mistakes:

  • Hiring a site-based person into this role without confirming computer competency.
  • Not testing attention to detail and accuracy.
  • Hiring on “organisational skills” alone without plan-reading or job flow knowledge.

🔺 Red Flags:

  1. No hands-on quoting experience or poor grasp of units/rates – big risk for underquoting.
  2. Blames site for errors without taking ownership for planning – shows poor accountability.
  3. Disorganised during the interview (late, missing documents, etc.) – reflects on future workflow.

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🧠 Operations Manager / Project Manager

❌ Common Mistakes:

  • Promoting someone who is good at “getting things done” but lacks leadership maturity.
  • Not probing deeply into financial literacy or cashflow understanding.
  • Ignoring coaching ability—this role sets the tone for the whole business.

🔺 Red Flags:

  1. Focuses only on job outcomes (“projects done”) with no mention of people or systems.
  2. Overuses “I had to do everything myself” narrative – doesn’t delegate well.
  3. Struggles to explain how they’ve improved a system, budget, or team process – lacking strategic thinking.

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When recruiting, you’re not just filling a gap, you’re shaping the business culture and capability for the next 5 years. So ask:

  • “Can this person grow with the business?”
  • “Would I trust this person to set the tone for others?”
  • “What habits are they bringing with them, and do we want those?”

Building a Strong Plumbing Team: The Key to Long-Term Success

Effective recruitment is a crucial step in growing your plumbing business. The right hiring strategy shapes your team, influences daily operations, and drives long-term success. By recognising common mistakes and red flags early, plumbing business owners can build a skilled and reliable workforce that supports profitability and efficiency.

If you’re seeking expert guidance to refine your recruitment strategy, plumbing business coaching can assist you in hiring, training, and leading with confidence. A plumbing business coach offers tailored strategies to enhance hiring decisions, team management, and business growth. Investing in business coaching for plumbers guarantees that every recruitment choice is aligned with your company’s future success.

Don’t let hiring missteps hinder your business. With the right strategy and support, you can build a thriving plumbing business. Obtain the tools and insights necessary for informed decisions; consider collaborating with a plumbing business coach to enhance your team and accelerate your growth.