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Commercial Plumbing hiring kit

How to hire for Commercial Plumbing.

To hire for commercial plumbing well, My Trade Talent's Commercial Plumbing hiring kit takes all 3 roles we recruit in order: what each seat is and what it pays, the technical questions that test it, the 3 credentials to verify, and what can kill the offer between acceptance and the first day.

3 roles: Journeyman Plumber (Commercial), Master Plumber, Commercial Plumbing PM. Free, with nothing to fill in. If you would rather a recruiter ran the search, that is the Commercial Plumbing recruiting page.

Step 1 · Plan

What each commercial plumbing seat is, and what it pays.

Each band is labelled with where it comes from. A My Trade Talent band is mid-experience, built from our own engagement history, and moves with experience and region. A BLS band is the federal 10th to 90th percentile, national and unadjusted, used where we have not closed enough searches in the trade to publish our own.

Commercial Plumbing roles, pay bands and credentials
RolePay bandCredentials that move an offer
Journeyman Plumber (Commercial)Installs and services commercial plumbing systems under a licence: domestic water, sanitary and vent, storm, gas, and the fixtures and equipment on the ends. $55,000 to $82,000My Trade Talent mid-experience band, built from our own engagement history. Experience and region move it; the salary calculator applies both. State License, Medical Gas
Master PlumberHolds the licence the plumbing work is permitted under and carries code responsibility for it. $75,000 to $115,000My Trade Talent mid-experience band, built from our own engagement history. Experience and region move it; the salary calculator applies both. State Master License, Backflow
Commercial Plumbing PMRuns commercial plumbing projects: buyout, submittals, fixture and equipment procurement, coordination with mechanical and electrical, change orders, billing and margin. $85,000 to $135,000My Trade Talent mid-experience band, built from our own engagement history. Experience and region move it; the salary calculator applies both. None that reliably moves an offer

We have closed 4 commercial plumbing searches in 2026 year to date, too few to publish a median for the trade, so this is the all-trades figure: My Trade Talent's median commercial trades hire took 21 days across 88 searches closed in 2026 year to date, counted as calendar days from our first contact with the candidate to the hire. The full distribution is in the Hiring Index.

Price the seat by experience and region in the salary calculator, and work out what leaving it open costs in the cost of vacancy calculator.

Step 3 · Interview

How to interview for each commercial plumbing role.

Everyone who applies will claim the experience. These are the questions that test it, the signals that separate a strong candidate from a plausible one, and the mistake each seat invites.

Journeyman Plumber (Commercial)

My Trade Talent band

Installs and services commercial plumbing systems under a licence: domestic water, sanitary and vent, storm, gas, and the fixtures and equipment on the ends. Commercial work means larger pipe, more coordination and materials - cast iron, copper, carbon steel, press fittings - that behave differently.

Questions that find out

  1. How do you size a vent for a battery of fixtures, and what goes wrong if you undersize it?
  2. When would you use press fittings on a commercial domestic water line, and when would you not?
  3. Walk me through testing a sanitary system before the walls close.

What a strong candidate shows

  • Pipe materials and joining methods described by application rather than preference
  • Has worked to a riser diagram and coordinated sleeves and penetrations before the pour
  • Medical gas or backflow certification where the work calls for it

The mistake this seat invites. Hiring residential service plumbers for commercial construction. The diagnostic skill is real but the coordination and layout demands are a different job.

Build a scorecard for this role Total an offer Pay by metro

Master Plumber

My Trade Talent band

Holds the licence the plumbing work is permitted under and carries code responsibility for it. The role combines technical authority - plan review, inspection liaison, methods and materials decisions - with supervision and, in smaller shops, estimating.

Questions that find out

  1. Which jurisdictions are you licensed in, and which were reciprocity?
  2. Which plumbing code is in force where we work, and what changed in the last cycle that affects commercial jobs?
  3. Describe a time you told a project manager a design would not pass. What happened?

What a strong candidate shows

  • States which jurisdictions the licence covers and how it was obtained
  • Has been the licence of record for a contractor, with the exposure that carries
  • Can talk through a plan review conversation with an AHJ

The mistake this seat invites. Treating the master licence as a seniority marker rather than a liability position. The person whose licence permits the work needs the authority to stop it.

Build a scorecard for this role Total an offer Pay by metro

Commercial Plumbing PM

My Trade Talent band

Runs commercial plumbing projects: buyout, submittals, fixture and equipment procurement, coordination with mechanical and electrical, change orders, billing and margin. Fixture lead times and owner-furnished equipment are the recurring schedule risks.

Questions that find out

  1. Owner-furnished fixtures are eight weeks late. What do you do about the schedule and the contract?
  2. How do you run coordination with the mechanical contractor on a tight ceiling?
  3. What do you verify at buyout before accepting the estimator's numbers?

What a strong candidate shows

  • Fixture schedules and owner-furnished equipment described as a tracked risk
  • Coordination with mechanical described in terms of sequence and space, not goodwill
  • Can state the margin carried and what moved it

The mistake this seat invites. Underweighting procurement. On commercial plumbing the schedule is usually lost in the submittal and fixture cycle rather than in the field.

Build a scorecard for this role Total an offer Pay by metro

Every role in every trade is in the interview question bank.

Step 4 · Offer

What can kill a commercial plumbing offer before day one.

The things that end an accepted offer between the yes and the start date, specific to this trade and each sourced.

  • One medical gas hire does not make you able to deliver a medical gas project

    Installing, inspecting and verifying are three separate ASSE qualifications held by three separate people: 6010, 6020 and 6030. A contractor who hires a 6010 installer has bought the ability to do the work, not the ability to sign it off. On a hospital job the question is which of the eleven numbers each person on the team holds, and whoever is missing has to be found or subcontracted before the schedule is written.

    Source: asse-plumbing.org/standards/professional-qualifications-standards

  • The service call one plumber cannot legally take

    A permit-required confined space entry needs more than the person going in. OSHA requires at least one attendant outside the space for the whole of entry operations, plus a designated entry supervisor, each trained for the role. So a lift station or vault job is a two- or three-person job by rule, not by preference. When the crew is short, the honest answer is sometimes that the next hire is what makes the work legal.

    Source: www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.1204

  • A candidate who is about to renew and has not booked the class

    Renewing an ASSE certification means sitting in a class of a set minimum length and passing a written exam, sometimes with a practical. That has to be scheduled, and classes are not offered every week in every market. A candidate whose card expires in six weeks is not six weeks from renewed unless they already have a seat booked. Ask for the expiry date and whether the class is on the calendar, before the offer rather than after.

    Source: asse-plumbing.org/personnel-certification/recertification

Add up the whole offer, not just the base, in the offer calculator.

Step 5 · Onboard

Credentials to verify before the first day.

Each names the body that issues it and links to the issuer's own page or a .gov page. Researched 2026-09-23; re-read the source before relying on an entry.

  • ASSE Series 6000 medical gas qualifications, of which 6010 is one of eleven

    ASSE International

    The credential behind every healthcare bid, and it is not a single thing. The series separates 6005 generalists, 6010 installers, 6015 cryogenic fluid central supply installers, 6020 inspectors, 6030 verifiers, 6035 cryogenic verifiers, 6040 maintenance personnel, 6050 instructors, 6055 cryogenic instructors, 6060 designers and 6070 design instructors. ASSE states that "the 2024 edition of ASSE Series 6000 parallels the medical gas-related requirements of NFPA 99-2024, Health Care Facilities Code", which is why a hospital project asks for the number and not the phrase.

    Source: asse-plumbing.org/standards/professional-qualifications-standards

  • ASSE recertification, every three years

    ASSE International

    Short and unforgiving. "Individuals with ASSE Certifications must recertify every three years", and "a certification is not valid after the expiration date". Recertification is not a form: it means attending a recertification class of a set minimum length and passing a written exam, and for some certifications a hands-on practical as well. The date on the card is the thing to check, because on a healthcare site an expired one is a compliance problem rather than an administrative one.

    Source: asse-plumbing.org/personnel-certification/recertification

  • Permit-required confined space roles under 29 CFR 1926 Subpart AA

    OSHA

    Vaults, lift stations, pits and interceptors put commercial plumbing inside the construction confined space standard, and the standard is written in terms of roles rather than cards. The employer must "provide at least one attendant outside the permit space into which entry is authorized for the duration of entry operations", and must "designate each person who is to have an active role ... in entry operations", identify their duties and train them. Entrant, attendant and entry supervisor are three defined jobs.

    Source: www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.1204

Licensing in commercial plumbing is set state by state, and this kit does not yet carry a state-by-state entry for it. Check with the licensing board in the state where the seat is. Open the credential check for Commercial Plumbing.

Step 6 · Retain

Where each role goes next.

Candidates ask about the next step in the first conversation, and an employer who can answer it keeps the people who had other options. Say it on day one, too.

  • Journeyman Plumber (Commercial)

    Journeymen progress to foreman, or to master plumber where the licence allows, and from there to estimating or ownership.

  • Master Plumber

    Masters move into operations, estimating or ownership; the licence is what makes the last of those possible.

  • Commercial Plumbing PM

    Project managers move to senior PM or operations, and some move into estimating where the buyout instinct pays.

Take it with you

The Commercial Plumbing guides.

The full interview guide, salary guide and whitepaper for the trade. Each download asks for your email; nothing on this page does.

Questions

Hiring for commercial plumbing: questions.

What interview questions should I ask when hiring for commercial plumbing?

My Trade Talent's Commercial Plumbing hiring kit carries three technical questions for each of its 3 roles. For the Journeyman Plumber (Commercial), the first is: "How do you size a vent for a battery of fixtures, and what goes wrong if you undersize it?" The full set, with the signals that separate a strong answer, is on this page and in the interview question bank.

What credentials should I verify when hiring in commercial plumbing?

The Commercial Plumbing kit lists 3, each with its issuing body and a primary source: ASSE Series 6000 medical gas qualifications, of which 6010 is one of eleven, ASSE recertification, every three years and Permit-required confined space roles under 29 CFR 1926 Subpart AA.

What can kill a commercial plumbing job offer before the start date?

The Commercial Plumbing kit names 3, each sourced: One medical gas hire does not make you able to deliver a medical gas project, The service call one plumber cannot legally take and A candidate who is about to renew and has not booked the class.

What do commercial plumbing roles pay?

Journeyman Plumber (Commercial): $55,000 to $82,000 (My Trade Talent band); Master Plumber: $75,000 to $115,000 (My Trade Talent band); Commercial Plumbing PM: $85,000 to $135,000 (My Trade Talent band). My Trade Talent bands are mid-experience and move with experience and region; BLS figures are national and unadjusted.

How long does it take to hire in commercial plumbing?

We have closed 4 commercial plumbing searches in 2026 year to date, too few to publish a median for the trade, so this is the all-trades figure: My Trade Talent's median commercial trades hire took 21 days across 88 searches closed in 2026 year to date, counted as calendar days from our first contact with the candidate to the hire.

Trade Talk A monthly hiring brief for commercial trades employers

What changed in your trade this month, and what to do about it.

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  • Interview and screening tactics that are landing candidates this month
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