How to conduct a successful plumber interview

Do you know the right questions to ask when it comes time to grow your business and hire some help, from apprentice to master plumber?

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There is more to a successful interview than industry knowledge. Any potential employee must also understand and respect safety precautions, work well under pressure and as part of a team and be equipped with good problem-solving skills. The apprentice must follow instructions, while the master plumber must demonstrate leadership skills as well as familiarity with regulations and processes. You will also need to tailor your questions according to the industry, for example, are you hiring a maintenance or contract plumber?

 Operational and situational questions

  • What license do you have as a plumber?
  • Have you ever plumbed an office building?
  • If you had to install a new system for an entire floor of a building, where would you start?
  • What is the first thing you look at before you design a plumbing system?
  • Do you have any experience installing water-based heating systems?
  • Walk me through the installation of a gas and liquid heating system, like an air-conditioning unit.
  • If a customer complains their house has too little water pressure, what steps would you take to fix the problem?
  • If a customer needs a new toilet installed and you remove the old one and discover the floor is rotting, what do you do?
  • How do you prioritise when dealing with different customers at the same time?
  • What safety precaution measures do you take when installing or maintaining a plumbing system?

 Role-specific questions

  • What experience do you have with snaking clogged pipes?
  • Do you prefer your water mains to be PVC or copper?
  • What advantages do PVC water mains provide?
  • Have you ever installed a shower with multiple shower heads? How did you keep water pressure high?
  • What are the advantages for installing steel plumbing underneath a sink? In what cases would you do it?
  • Discuss a downside of a conventional water heater. Would you suggest an alternative?

 Behavioural questions

  • What is the worst thing you had to do as a plumber?
  • Tell us about your most challenging task and how you performed.
  • Describe a time you were given incomplete instructions about a project. What did you do?
  • Recall a time you offered excellent customer service as a plumber.
  • Describe a time you had to work in a team to complete a project. What was your role?

Questions sourced from



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