The plumbing workforce gap is well-documented. An estimated 550,000 skilled trades workers retire every year, and the pipeline of young workers entering plumbing apprenticeships hasn't kept pace. What that means practically: when you post a plumbing job, most of the skilled candidates who see it are already employed — and they're not looking, they're just open.
This guide is for small plumbing contractors — the 3-to-15 employee shop where the owner is still on tools half the time. The advice here is practical, not theoretical. You're not running a corporate talent acquisition function. You need to find good plumbers, verify they're qualified, and actually get them to accept your offer.
Understanding Plumbing License Levels
Before you post a job or make an offer, you need to know what license level you actually need — and what each level is legally permitted to do.
Apprentice Plumber
An apprentice is enrolled in a formal apprenticeship program (typically 4–5 years) and can only work under direct supervision of a licensed journeyman or master plumber. They're legal to hire for basic work, but they cannot work independently and should not be left alone on a job site. If you're trying to build your bench and have capacity to train, apprentices are a longer-term play.
Journeyman Plumber
A journeyman has completed their apprenticeship and passed a licensing exam. They can perform most plumbing work independently. This is the workhorse level — the majority of your plumbers will likely be journeymen. What they cannot do in most states: pull permits, supervise others, or run a plumbing business without a master plumber of record.
Master Plumber
A master has passed a more advanced exam (typically requiring 2–4 years of journeyman experience) and can pull permits, supervise other plumbers, and act as the responsible party on a plumbing project. Most small plumbing companies need at least one master on staff — often the owner. If you're hiring for your first full-time plumber, make sure you (or they) have master status for permit work.
License verification: Every state maintains a searchable database of licensed plumbers. Verify before you extend an offer — not after. Candidates occasionally misrepresent their license level or have let their license lapse. A quick check on your state's licensing board website takes two minutes.
State vs. local licensing
Plumbing licensing varies more than almost any other trade. Some states (California, Texas, Florida) have statewide licensing systems. Others (like Colorado) have no statewide license requirement and leave it entirely to municipalities. Wherever you operate, know whether a state license, a city license, or both are required — and verify accordingly.
Where to Find Plumbers in a Tight Market
If you're waiting for a qualified plumber to find your job posting, you'll wait a long time. The best candidates are working — you need to reach them where they are.
Plumbing supply house relationships
This is the most underused channel in the trades. Supply house counter staff know every plumber in your area. They hear complaints about employers all day — "management is a nightmare," "no overtime," "trucks are junk." Build a relationship with your local Ferguson, Hajoca, or independent supply house, and let them know you're hiring. A word from a trusted supply rep is worth ten job board postings.
Plumbing union halls
Even if you run a non-union shop, union halls sometimes have members available for work when major commercial projects wind down. UA (United Association of Plumbers and Pipefitters) locals maintain referral lists. It's worth a conversation — you're not obligated to go union to access these contacts.
Trade-specific job boards
Plumbing-Heating-Cooling Contractors Association (PHCC) and similar organizations run job boards that get significantly less noise than Indeed. The volume is lower but the candidates are more relevant.
Competitor employees who are unhappy
This sounds uncomfortable but it's how the trades actually work. If you hear through your network that a competitor is having payroll problems, went through a rough ownership change, or is losing technicians — reach out. A personalized note through LinkedIn or a direct call is appropriate. You're not poaching; you're being available when someone is ready to move.
Vocational and trade school programs
Two-year plumbing programs at community colleges produce students who have classroom knowledge and some shop experience. They need on-the-job training but are highly motivated and haven't developed bad habits yet. Contact placement offices, offer to come speak to graduating classes, and set up an intern-to-hire pipeline.
Screen applicants before you call them
FieldHire AI verifies license level, years of experience, and trade-specific knowledge — so your first conversation is with a qualified candidate, not a discovery call.
Plumber Salary Benchmarks (2025–2026)
Post your pay range. Experienced plumbers know exactly what the market pays in your area — vague "competitive pay" postings are read as either below-market or disorganized. Be transparent and you'll attract candidates who are actually a fit.
| License Level | Hourly Range | Annual (40hr/wk) | Notes |
|---|---|---|---|
| Apprentice (Yr 1–2) | $18–$24/hr | $37K–$50K | Supervised work only |
| Apprentice (Yr 3–5) | $22–$30/hr | $46K–$62K | More complex tasks |
| Journeyman Plumber | $28–$42/hr | $58K–$87K | Independent work; wide range by market |
| Journeyman (Senior) | $38–$50/hr | $79K–$104K | 8+ years, specialization |
| Master Plumber | $45–$65/hr | $94K–$135K | Permit authority; supervises others |
| Gas/Medical Gas Specialist | $50–$70/hr | $104K–$145K | Specialized certifications required |
High-cost metros (New York, San Francisco, Boston, Chicago) run 20–30% above these figures. Rural markets run 10–20% below. Overtime is standard in plumbing — factor it into your comp positioning when competing against union shops where overtime is clearly defined in the contract.
Beyond base rate, plumbers value: company vehicle policy (particularly whether they can take the truck home), phone and tablet reimbursement, health insurance, and clarity on overtime. If you offer take-home trucks, say so in the job posting — it's a meaningful benefit that many small shops offer but forget to advertise.
Interview Questions That Actually Work for Plumbing Roles
Generic interview questions don't reveal trade competency. Here are questions that do:
Technical screening
- "Walk me through how you'd approach a main line stoppage where you can't find the cleanout." — A good answer involves locating the sewer clean-out, checking for accessible junctions, and possibly using a camera. An answer that goes straight to "dig it up" skips diagnostics.
- "Describe the last water heater installation you did. What type of unit, what challenges?" — Listen for specifics: expansion tank requirements, gas line sizing, permits pulled. Vague answers from someone claiming experience are a yellow flag.
- "Have you worked with PEX, copper, and CPVC? Do you have a preference and why?" — Tests familiarity with modern materials and willingness to work with what the job requires, not just their preference.
- "What's the uniform plumbing code requirement for drain slope?" — 1/4" per foot for drains 3" and under; 1/8" for larger drains. Anyone who's worked service long enough knows this cold.
Problem-solving and judgment
- "A customer calls saying they have no hot water. What are your first five diagnostic steps?" — Should cover: pilot light / power, thermostat setting, reset button, gas supply, circuit breaker. Not just "replace the water heater."
- "You find additional work on a job that wasn't in the original scope. What do you do?" — Tests communication habits. You want someone who calls you (or the customer) before proceeding, not someone who either ignores it or self-authorizes thousands of dollars in extra work.
Work style and reliability
- "What does your current / last employer do well? What could they improve?" — They'll be diplomatic, but listen for what they value: schedule consistency, management communication, equipment quality, pay transparency.
- "How do you handle emergency calls outside normal hours?" — Their answer tells you their expectations around on-call requirements. Align on this before day one.
What Makes Plumbers Stay (and What Drives Them to Leave)
The plumbing labor shortage means your existing techs have constant options. Retention is the hiring problem most shop owners don't think about until it's too late.
What drives plumbers to leave
Disorganized dispatching. Sending someone across town twice for a part that should have been on the truck, scheduling back-to-back appointments with no travel buffer, or changing the schedule three times before 9am — these are small indignities that compound. Your best tech tolerates it. Your good techs will quietly start taking calls from competitors.
Equipment and van condition. A plumber's truck is their workspace. An unreliable truck, missing tools, or a van that overheats in July is a daily frustration that communicates how much you value their time. This one's entirely in your control.
No path forward. A journeyman who's been with you for four years and is still doing the same thing, at the same rate, with no conversation about growth or master's exam prep — is someone who will leave when a competitor offers a $2/hr bump. Annual raise conversations, even small ones, and a willingness to pay for master exam prep courses go a long way.
What keeps plumbers loyal
Predictability. Consistent hours, consistent pay, clear overtime rules. Plumbers with families especially value a shop that doesn't routinely call at 4pm for a 6pm emergency that everyone knew about at noon.
The owner works on the tools. If you're still out in the field, your crew respects that. The moment you become "the guy in the office," your credibility with your techs changes. Not a reason to stay in the field forever, but awareness of this dynamic helps.
Being the employer who pays on time, every time. This sounds obvious. In the trades, it's not. Cash flow problems in small contracting businesses cause payroll delays that permanently damage trust. Get your billing processes right before you hire, not after.
Start hiring faster
FieldHire AI screens your plumbing applicants for license level, experience, and trade knowledge. Spend your time on candidates who are actually qualified.
Building a Plumber Pipeline When You're Not Actively Hiring
The worst time to find a plumber is when you desperately need one. The best time is when you don't.
Keep a running "short list" of two or three candidates who were good but you didn't have an opening for — stay in touch occasionally. If a supply rep mentions someone who seems frustrated with their current shop, take the coffee meeting. When your next opening comes up, you want names you can call, not a job board you're starting from scratch on.
Track where your best hires came from. Referrals from existing employees? Supply house contacts? Trade school relationships? Double down on those channels. Every shop's best source is slightly different based on your market and relationships.
For more detail on automated pre-screening that verifies license level and experience before you make the first call, see FieldHire's plumbing recruiting page.