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Here's your quick checklist on how to hire plumbers. Read on for more details.

This hire guide was edited by the ZipRecruiter editorial team and created in part with the OpenAI API.

How to hire Plumbers

Hiring the right plumbers is a critical decision for any medium to large business that relies on robust facilities, ongoing construction, or property management. Plumbers are responsible for the installation, maintenance, and repair of piping systems, fixtures, and other plumbing equipment essential to the smooth operation of commercial properties. The quality of plumbing work directly impacts operational efficiency, safety, and regulatory compliance. A single oversight can result in costly water damage, health code violations, or even business interruptions. Therefore, selecting skilled and reliable plumbers is not just about filling a vacancy--it is about safeguarding your company's assets and reputation.

In today's competitive labor market, the demand for experienced plumbers continues to rise, driven by ongoing urban development, aging infrastructure, and increasingly complex building systems. Businesses that invest in hiring top plumbing talent benefit from fewer emergency repairs, reduced downtime, and increased tenant or employee satisfaction. Moreover, a well-chosen plumber can contribute to sustainability initiatives by recommending water-saving solutions and ensuring compliance with environmental standards.

For HR professionals and business owners, understanding the nuances of the plumbing trade--from technical skills and certifications to soft skills and cultural fit--is essential for making informed hiring decisions. This guide provides a comprehensive overview of the hiring process for plumbers, offering practical insights and actionable steps tailored to the needs of medium and large organizations. Whether you are expanding your in-house maintenance team or seeking specialized expertise for a major project, this resource will help you attract, evaluate, and retain the best plumbing professionals in the industry.

Clearly Define the Role and Responsibilities

  • Key Responsibilities: Plumbers in medium to large businesses are tasked with installing, repairing, and maintaining water supply lines, waste disposal systems, and related appliances and fixtures. Their duties often include reading blueprints, diagnosing plumbing issues, performing preventative maintenance, and ensuring compliance with local building codes and safety regulations. In commercial settings, plumbers may also work on large-scale piping systems, backflow prevention, water heaters, boilers, and specialized equipment such as medical gas lines or fire suppression systems. They are frequently called upon to respond to emergencies, coordinate with other trades, and document all work performed for regulatory and insurance purposes.
  • Experience Levels: Junior plumbers typically have 0-2 years of experience and may be recent graduates of trade schools or apprenticeship programs. They often work under supervision, handling basic repairs and installations. Mid-level plumbers, with 3-7 years of experience, are capable of independently managing more complex tasks, troubleshooting issues, and mentoring junior staff. Senior plumbers, with 8+ years of experience, often oversee teams, manage large projects, and ensure compliance with all relevant codes and standards. They may also be responsible for training, project planning, and liaising with external contractors or inspectors.
  • Company Fit: In medium-sized companies (50-500 employees), plumbers may be part of a small facilities or maintenance team, requiring versatility and the ability to handle a wide range of tasks. They may also need to interact directly with building occupants or clients. In large organizations (500+ employees), plumbers are often part of a specialized facilities management department, with more defined roles and responsibilities. These environments may require advanced technical skills, familiarity with complex building management systems, and the ability to work within a larger, cross-functional team. The scale and complexity of projects in large companies often demand higher levels of certification, experience, and project management capability.

Certifications

Certifications are a vital component in assessing the qualifications and credibility of plumbers. Industry-recognized certifications not only validate technical skills but also demonstrate a commitment to safety, professionalism, and ongoing education. The most common and respected certifications for plumbers include:

Journeyman Plumber License: Typically issued by state or local licensing boards, this certification is a minimum requirement for most plumbing positions. To obtain a journeyman license, candidates must complete a formal apprenticeship (usually 4-5 years), pass a comprehensive exam, and meet specific work experience requirements. This license authorizes plumbers to work independently on most residential and commercial projects.

Master Plumber License: This advanced certification is also issued by state or municipal authorities and requires several additional years of experience beyond the journeyman level (often 2-5 years). Candidates must pass a rigorous exam covering advanced plumbing systems, codes, and project management. Master plumbers are qualified to supervise teams, pull permits, and take on large-scale or specialized projects. In many jurisdictions, only master plumbers can operate their own businesses or serve as the responsible party for company licenses.

Backflow Prevention Certification: Offered by organizations such as the American Society of Sanitary Engineering (ASSE) or state health departments, this certification is essential for plumbers working with potable water systems. It ensures that plumbers are trained to install, test, and maintain backflow prevention devices, which protect water supplies from contamination.

Medical Gas Installer Certification: For plumbers working in healthcare facilities, certification from the American Society of Sanitary Engineering (ASSE 6010) or similar organizations is often required. This credential verifies specialized training in the installation and maintenance of medical gas piping systems, which are subject to strict regulatory standards.

Green Plumber Certification: Offered by organizations such as Green Plumbers USA, this certification focuses on water conservation, energy efficiency, and sustainable plumbing practices. It is increasingly valued by employers seeking to reduce environmental impact and comply with green building standards.

Employers should verify all certifications during the hiring process, as they are often required by law and can significantly impact insurance rates, project eligibility, and regulatory compliance. Additionally, ongoing education and recertification demonstrate a plumber's commitment to staying current with industry advancements and safety protocols.

Leverage Multiple Recruitment Channels

  • ZipRecruiter: ZipRecruiter is an outstanding platform for sourcing qualified plumbers due to its targeted job matching algorithms, extensive candidate database, and user-friendly interface. Employers can post job openings and have them distributed across hundreds of job boards, maximizing exposure to active job seekers. ZipRecruiter's screening tools allow HR professionals to filter candidates based on certifications, experience, and skill sets, streamlining the selection process. The platform's AI-driven matching system proactively suggests top candidates, reducing time-to-hire and increasing the likelihood of finding a strong fit. Many businesses report higher response rates and faster placements when using ZipRecruiter for skilled trades positions, including plumbing roles. The ability to manage applications, schedule interviews, and communicate with candidates all in one place makes it an ideal solution for busy HR teams and hiring managers.
  • Other Sources: In addition to online job boards, internal referrals remain a powerful recruitment channel. Employees often know qualified tradespeople from previous jobs or training programs, and referral bonuses can incentivize high-quality recommendations. Professional networks, such as local trade unions and apprenticeship programs, are also valuable sources of vetted talent. Industry associations frequently host job boards, career fairs, and networking events that connect employers with experienced plumbers. General job boards and company career pages can attract a broad pool of applicants, but may require more rigorous screening to identify top candidates. Partnering with technical schools and community colleges can help build a pipeline of entry-level talent, while specialized staffing agencies can assist with sourcing for hard-to-fill or temporary positions. Combining multiple channels increases the likelihood of finding candidates who not only meet technical requirements but also align with your company's culture and values.

Assess Technical Skills

  • Tools and Software: Plumbers must be proficient in the use of a wide range of hand and power tools, including pipe cutters, threaders, wrenches, soldering torches, and inspection cameras. In commercial environments, familiarity with advanced diagnostic equipment, such as ultrasonic leak detectors and pressure testing devices, is essential. Increasingly, plumbers are expected to use digital tools for work order management, scheduling, and documentation. Experience with facilities management software (such as CMMS platforms), blueprint reading applications, and mobile inspection apps can improve efficiency and communication. Knowledge of building automation systems and smart plumbing technologies is a plus, particularly in large or modern facilities.
  • Assessments: Evaluating technical proficiency requires a combination of written tests, hands-on demonstrations, and scenario-based interviews. Practical assessments might include tasks such as assembling piping systems, diagnosing simulated leaks, or interpreting complex blueprints. Employers can use standardized technical tests to assess knowledge of plumbing codes, safety regulations, and best practices. Reviewing a candidate's project portfolio or asking for documentation of previous work can provide additional insights into their capabilities. For senior roles, consider evaluating project management skills, familiarity with regulatory compliance, and the ability to oversee large teams or complex installations.

Evaluate Soft Skills and Cultural Fit

  • Communication: Plumbers in medium and large organizations must interact with a diverse range of stakeholders, including facility managers, engineers, contractors, and non-technical staff. Strong verbal and written communication skills are essential for explaining technical issues, providing clear updates, and documenting work performed. Effective plumbers can translate complex concepts into language that is accessible to clients or colleagues, ensuring that everyone is aligned on project goals and timelines. During interviews, assess candidates' ability to articulate their thought process and respond to hypothetical scenarios involving cross-functional collaboration.
  • Problem-Solving: The best plumbers are resourceful and adaptable, able to diagnose issues quickly and develop creative solutions under pressure. Look for candidates who demonstrate a methodical approach to troubleshooting, ask clarifying questions, and remain calm in challenging situations. Behavioral interview questions--such as describing a time they resolved a difficult plumbing issue or managed an unexpected emergency--can reveal key traits like initiative, resilience, and critical thinking.
  • Attention to Detail: Precision is critical in plumbing, where small errors can lead to significant safety hazards or costly repairs. Assess attention to detail by asking candidates to walk through their process for inspecting completed work, ensuring code compliance, or documenting repairs. Practical tests that require careful measurement, adherence to specifications, or identification of potential issues can help gauge this competency. References from previous supervisors can also provide valuable feedback on a candidate's reliability and thoroughness.

Conduct Thorough Background and Reference Checks

Conducting thorough background checks is a crucial step in the hiring process for plumbers, given the significant responsibilities and potential risks associated with the role. Begin by verifying the candidate's work history, ensuring that their stated experience aligns with documented employment records. Contact previous employers to confirm job titles, dates of employment, and the nature of work performed. Ask specific questions about reliability, technical competence, and adherence to safety protocols.

Reference checks provide additional insights into a candidate's work ethic, problem-solving abilities, and interpersonal skills. Speak with supervisors or colleagues who can attest to the candidate's performance on the job, particularly in high-pressure or emergency situations. Inquire about the candidate's ability to follow instructions, complete tasks on time, and maintain positive relationships with team members and clients.

Certification verification is essential, as many plumbing roles require valid licenses or specialized credentials. Request copies of all relevant certifications and confirm their authenticity with the issuing organizations. This step is especially important for roles involving medical gas systems, backflow prevention, or other regulated specialties. Additionally, check for any disciplinary actions or license suspensions that could impact the candidate's eligibility for employment.

Depending on the nature of the work and the level of access required, consider conducting criminal background checks and drug screenings in accordance with local laws and company policies. For positions involving work in sensitive environments--such as schools, hospitals, or government facilities--additional security clearances may be necessary. By performing comprehensive due diligence, employers can mitigate risks, ensure compliance, and make informed hiring decisions that protect both the company and its stakeholders.

Offer Competitive Compensation and Benefits

  • Market Rates: Compensation for plumbers varies based on experience, location, and the complexity of the work. As of 2024, entry-level plumbers in most U.S. markets can expect to earn between $40,000 and $55,000 annually. Mid-level plumbers typically command salaries in the range of $55,000 to $75,000, while senior or master plumbers may earn $80,000 to $100,000 or more, especially in high-cost urban areas or specialized industries. Overtime pay, shift differentials, and bonuses for emergency call-outs or project completion can further enhance total compensation. Employers should regularly benchmark pay rates against local and industry standards to remain competitive and attract top talent.
  • Benefits: In addition to competitive salaries, comprehensive benefits packages are essential for recruiting and retaining skilled plumbers. Health insurance (medical, dental, and vision) is a standard offering, along with retirement plans such as 401(k) matching. Paid time off, including vacation, sick leave, and holidays, contributes to job satisfaction and work-life balance. Other attractive perks include tool allowances, company vehicles, uniforms, and reimbursement for continuing education or certification renewals. Some employers offer wellness programs, flexible scheduling, or opportunities for advancement into supervisory or project management roles. For large organizations, additional benefits such as tuition assistance, childcare support, or employee assistance programs can set your company apart in a competitive labor market. Highlighting these benefits in job postings and during interviews can help attract candidates who are not only qualified but also committed to long-term growth with your organization.

Provide Onboarding and Continuous Development

Effective onboarding is essential for integrating new plumbers into your organization and setting them up for long-term success. Begin by providing a comprehensive orientation that covers company policies, safety procedures, and an overview of the facilities or projects they will be working on. Introduce new hires to key team members, supervisors, and support staff, fostering a sense of belonging and encouraging open communication from day one.

Hands-on training should be tailored to the plumber's experience level and the specific requirements of your business. For junior hires, pair them with experienced mentors who can provide guidance, answer questions, and model best practices. For more experienced plumbers, focus on familiarizing them with your company's systems, documentation protocols, and any specialized equipment or technologies in use. Provide access to resources such as technical manuals, safety data sheets, and online training modules to support ongoing learning.

Set clear expectations regarding performance standards, work schedules, and communication protocols. Establish regular check-ins during the first 90 days to address any challenges, provide feedback, and celebrate early successes. Encourage new hires to share their insights and suggestions for process improvements, demonstrating that their expertise is valued. By investing in a structured and supportive onboarding process, employers can accelerate productivity, reduce turnover, and build a strong foundation for long-term employee engagement and success.

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