Three plumbing adverts, three different meanings of “qualified”. A Dallas contractor wants a “Texas journeyman plumber licence, commercial”. A Lancashire firm wants a “plumber, NVQ Level 2 minimum, Gas Safe a bonus”. A Lagos estate management company wants a “plumber, trade test grade II, borehole and pump experience”. In the United States the licence belongs to you and the state issues it. In the United Kingdom there is no plumbing licence at all, but the gas side of the trade is criminal to touch without registration. In Nigeria the document is a government trade test and the real check is your last employer.
That structure decides how you get hired, what you can legally do on day one and where the money is. What follows is the market-by-market version, then the parts that are common: the sectors, emergency work, tools and vans, how pay is built, and how to write an application that a contracts manager reads in five seconds.
United States: state licences, and the code they test you on
There is no federal plumbing licence. Most states license individuals through an apprentice, journeyman and master ladder, and the exam is built on whichever model code the state has adopted, usually the International Plumbing Code or the Uniform Plumbing Code, with local amendments. A few states license the contracting business rather than the individual.
| State | Who licenses the individual | Shape |
|---|---|---|
| Texas | Texas State Board of Plumbing Examiners (TSBPE) | Apprentice → tradesman plumber-limited → journeyman → master. Statewide; endorsements for medical gas and water supply protection. |
| California | Contractors State License Board licenses the C-36 business; no state journeyman card | Employers set the bar for journeymen; union (UA) and non-union apprenticeships both used. Local jurisdictions may require their own cards. |
| Michigan | Department of Licensing and Regulatory Affairs (LARA) | Apprentice registration → journey plumber (hours plus exam) → master plumber. Statewide. |
| Florida | State certifies contractors; counties register journeymen | Journeyman cards are county-level in much of the state, so a move across county lines can mean a new card. |
Two rules travel across all of them. Backflow prevention assembly testing is a separate certification almost everywhere, and it opens commercial and municipal work. And gas fitting is treated differently by state: in some it is inside the plumbing licence, in others it is a separate endorsement or a separate licence altogether, so check before you claim it on an application. Overtime at one and a half times applies beyond forty hours in a week for employed plumbers; a 1099 contractor gets none.
US openings on Hirovo are grouped by county: plumber jobs in Dallas County, San Diego County and Oakland County, Michigan are three of the largest.
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Create a free account →United Kingdom: no licence for water, a criminal offence for gas
The UK does not license plumbers. Anyone can call themselves one, and the market sorts competence through qualifications, schemes and reputation. But the trade has a hard legal line running through it: under the Gas Safety (Installation and Use) Regulations 1998, working on a gas fitting without being competent and registered on the Gas Safe Register is a criminal offence. Registration is personal, per category (domestic natural gas, LPG, commercial), and assessed through the ACS scheme, with reassessment every five years.
This is why adverts say either plumber or plumber and heating engineer. A plumber can do everything on the water side, including the wet side of a heating system, bathrooms, kitchens, drainage and cold water. A heating engineer can also break into the gas supply, install, commission and service boilers, and is paid accordingly. The route from one to the other is an ACS assessment after documented experience, and it is the single biggest pay step in the trade.
Qualifications and schemes employers actually ask for
- NVQ or diploma Level 2 and Level 3 in plumbing and domestic heating (City & Guilds or EAL), or the plumbing and domestic heating technician apprenticeship. Level 2 gets you hired as an improver; Level 3 is what “qualified” means to most firms.
- G3 unvented hot water qualification, needed to install and service unvented cylinders, which are now standard in new-build.
- Water Regulations (WRAS/Water Supply Regulations) certificate, and approved contractor status through WaterSafe for the business, which lets it self-certify notifiable work to the water company.
- CSCS or JIB-PMES card for site access on construction and commercial projects.
- Gas Safe registration and, increasingly, heat pump and renewables qualifications, which employers are short of.
PAYE, CIS or agency
Direct employment on PAYE brings holiday and sick pay. Under the Construction Industry Scheme a self-employed plumber has 20 percent deducted at source and settles through self-assessment, usually for a higher day rate and no holidays. Agency work brings equal pay after 12 weeks under the Agency Workers Regulations. Convert each to an annual figure with holidays, sickness, van and tools before you compare.
UK openings on Hirovo are listed by county: see plumber jobs in Lancashire, Nottinghamshire and Kent.
Nigeria: the trade test, the borehole and the contract
Nigeria has no plumbing licence. The document employers ask for is the Federal Ministry of Labour and Employment trade test, graded III (entry), II and I (highest), which is the recognised proof of competence for tradesmen and is what formal employers, construction companies, estate and facility-management firms, hotels and hospitals, put in their adverts. Beyond that, hiring runs on your last employer, a guarantor and what you can show on a site.
The work is shaped by the water supply. Where municipal water is unreliable, a plumber is expected to handle boreholes, submersible and surface pumps, overhead and underground tanks, pressure systems and water treatment, not only internal pipework and sanitary fittings. A plumber who can design and install a whole building’s supply, from borehole to tap, is in a different pay band from one who repairs leaks, and estate management companies pay for that.
As in every Nigerian trade, the real divide is formal against informal. Registered contractors and facility managers pay monthly through payroll, remit pension contributions, give written terms within three months as the Labour Act requires, and supply tools. Informal work is daily-paid and unwritten. Verify the employer, get the terms in writing, and confirm that the pension deducted is actually being remitted.
Nigerian openings on Hirovo are grouped by local government area: plumber jobs in Kosofe, Lagos, Oyigbo, Rivers State and Ovia South-West, Edo.
The sector decides the job far more than the title does
“Plumber” covers at least five different working lives, with different hours, tools and pay.
- Domestic maintenance and repair. Leaks, taps, cisterns, blocked drains, bathroom replacements. Customer-facing, van-based, often self-employed or with a small firm. Reputation is the marketing.
- New-build and site work. First fix and second fix across dozens of plots, to drawings and programme, on day rates. Fast, repetitive, ends with the project. Site cards required.
- Commercial and facilities maintenance. Offices, hospitals, hotels, schools: planned maintenance, legionella control, plant rooms, on-call rotas. The most stable, with the most overtime.
- Heating and gas (UK). Boilers, cylinders, heat pumps. Requires Gas Safe registration and, increasingly, renewables qualifications. The best-paid domestic work.
- Water systems (Nigeria). Boreholes, pumps, tanks, treatment, pressure systems. Design-and-install work for estates and commercial buildings.
If you are newly qualified, site work teaches speed and drawings; maintenance teaches fault-finding and customers. If you are experienced and stuck at the standard rate, the moves that pay are gas and heating in the UK, master licence and backflow in the US, and system design in Nigeria.
Call-outs, nights and how the pay is actually built
Plumbing has more emergency work than most trades, and the difference between two offers is usually in how that work is paid.
Call-out pay has three parts. A standby allowance for being on the rota; a call-out fee or minimum hours per call attended, typically two to four hours at an enhanced rate; and an enhanced rate for the hours on the job at night or at weekends. None is set by statute in any of the three markets. Ask for each as a figure, and get it in writing.
Base rate is what everything else is calculated on. Overtime in the US, holiday pay in the UK and any future rise start from the base. A high base with a modest on-call allowance beats a low base with generous emergency rates that depend on things breaking.
Van, fuel and tools. A company van with fuel, supplied power tools and testing kit, and tool insurance are worth thousands a year. A mileage allowance and your own van rarely match it. Ask who supplies what and whether travel to the first job is paid.
Day rate or salary. Site day rates look high until you subtract holidays, sickness and the weeks between projects. Convert everything to an annual figure before comparing.
Nobody legitimate charges you to start a plumbing job. Not a tools deposit, not a van deposit, not a “licence verification fee” or “card processing fee” paid to a recruiter, not an agency registration fee, and not a payment refunded after your first month. In the US you pay the state board directly for your exam and licence; in the UK you pay the awarding body, the assessment centre and Gas Safe directly; in Nigeria you pay the Ministry of Labour for the trade test. A middleman collecting that money is not part of the process. The other pattern to refuse: sending copies of your licence, ID and bank details before a verified written offer from a contractor whose registration and address you have checked.
An application a contracts manager can read in five seconds
Whoever screens your application has a job starting Monday and a gap on the rota. They want to know whether you can be put on it, and on what kind of work. Put that in the first four lines.
- Line one: your licence, registration or trade test, with expiry. US: state, licence class and number, backflow certification. UK: NVQ level, Gas Safe registration number and categories if held, G3, water regulations. Nigeria: trade test grade and year.
- Line two: the sectors and the work, in specifics. “New-build first and second fix, 120 plots; commercial maintenance on a hospital site, 2 years; boreholes and pump installation for three estates” tells a manager where you fit.
- Line three: what you can commission and sign. Systems you have commissioned, tested and certified. This line moves you up the pile.
- Line four: driving licence, van and tools. A full licence, your own van or not, and the testing kit you own answer the questions the manager was about to ask.
- Line five: availability in rota words. On-call, nights, weekends, working away, short-notice cover.
- Finally, a supervisor who will give a reference. A bad installation follows a name in this trade; a named referee who vouches for your work is worth more than any certificate.
Going self-employed: what it costs before you earn anything
Plumbing is one of the easiest trades to go self-employed in and one of the easiest to lose money in during the first year, because the costs arrive before the work does.
Before the first invoice you will need a van, tools and testing kit, public liability insurance, which customers and contractors ask for and which most commercial work requires at a stated level, and van and tool insurance, since tools stolen from a van overnight are usually excluded from a standard policy. In the United Kingdom add scheme registration if you intend to self-certify: Gas Safe registration for gas work, a competent person or water regulations approved contractor scheme for notifiable work, and the assessment visits that go with them. In the United States add the licence, bond and, in most states, the contractor registration required to trade in your own name rather than working under someone else’s licence. In Nigeria add registration of the business name and the working capital to buy materials before customers pay.
Then there is the part that catches people out: cash flow. Materials are paid for up front and invoices are paid in 30 days if you are lucky, so a busy month can leave you short. Domestic customers pay faster than builders. Ask new commercial clients for payment terms in writing before you start, take deposits on jobs with large material costs, and price emergency and out-of-hours work properly rather than treating it as a favour, because it is the work that funds the quiet weeks.
The alternative that most plumbers use for the first year is a hybrid: keep a maintenance contract or a few days a week with a firm for steady income, and build private work around it. It is slower, and it means you still have money coming in when a customer disappears without paying, which will happen.
Where plumber jobs are listed on Hirovo
Listings are grouped by country, then region, then county or local government area, so you can search where a 07:00 start is actually reachable.
- United States: Dallas County · San Diego County · Oakland County · all locations in Michigan
- United Kingdom: Lancashire · Nottinghamshire · Kent · all locations in England
- Nigeria: Kosofe, Lagos · Oyigbo, Rivers State · Ovia South-West, Edo · all locations in Rivers State
Summary
The document that makes you employable is a state licence in the US, a set of qualifications plus, for gas, a registration in the UK, and a trade test in Nigeria. Find out which the advert means, get it, and put it in the first line with its expiry date.
Then compare the packet, not the headline: call-out structure, van, tools, travel, and whether the rate carries holidays. And let the work speak in specifics: sectors, what you can commission and sign, and a supervisor who will vouch for you. A contracts manager who reads that in the first four lines calls you first.