People often ask "Level 2 or Level 3?" when the real question is "which kind of Level 2 or Level 3?" Two qualifications can carry the same level number and be worth very different things to an employer. This guide separates the two, then shows you how to decide what you need.

The first thing to understand: there are two kinds of Level 2 and Level 3

The word "level" tells you how difficult a qualification is. It does not tell you what kind of qualification it is. In plumbing, the type matters more.

Diploma (technical or vocational) NVQ Diploma (competence)
Example City & Guilds 6035 Plumbing Studies City & Guilds 6189 NVQ Diplomas
Where it happens College or training centre Mostly on real jobs, plus centre units
How it is assessed Tests and practical assignments Observation and portfolio from real work, tests, and in-centre assessment
Needs a job? No Yes, or access to real work
Proves occupational competence? No Yes
Supports a JIB-PMES Blue or Gold Card? No Yes

City & Guilds' 6035 page describes those diplomas as being for people who want to enter the plumbing industry, assessed through multiple-choice tests and practical assignments. It lists progression to an NVQ or apprenticeship. That is a useful role, but it is not the same thing as being a qualified plumber.

JIB-PMES makes the distinction explicit. For the Blue Card, it says Level 1 qualifications and Level 2 vocational qualifications such as C&G 6129 or 6035 are not accepted. For the Gold Card, it says the same about Level 3 vocationally related qualifications. Anyone holding only technical certificates, and not continuing to a Level 3 NVQ or Diploma, can apply only for the Labourer/Plumber's Mate Green Card.

So here is the rule that will save you the most money: a Level 3 college diploma does not outrank a Level 2 NVQ on a site. To a card scheme, the Level 2 NVQ counts and the Level 3 diploma does not.

Level 2 vs Level 3 at a glance

This table compares the competence qualifications, using the City & Guilds 6189 NVQ Diplomas as the example. BPEC, EAL and LCL offer comparable NVQ Diplomas.

Level 2 NVQ Diploma Level 3 NVQ Diploma
City & Guilds code 6189-11 6189-31 (or 6189-33 with gas)
Guided learning hours 596 549 to 659 (1,034 with gas)
Total qualification time 760 680 (1,460 with gas)
Typical candidate People learning the trade, working under supervision People who have completed Level 2 or have relevant experience, working with minimal supervision
Card supported JIB-PMES Plumber Blue JIB-PMES Plumber Gold
WaterSafe view Minimum standard, with a Water Regulations certificate Recommended for full competence
Last registration date 31 December 2028 31 December 2028

Do not read too much into the hours. The Level 3 route assumes you already have Level 2 knowledge and experience. City & Guilds lists the Level 3 entry level as Level 2, while also stating there are no formal entry requirements. In other words, you do not necessarily need the Level 2 certificate, but you do need to be working at that standard.

An experienced plumber commissioning a large unvented hot water cylinder in a UK airing cupboard.
Level 3 work tends to involve more complex systems and more independent responsibility.

What does Level 2 cover?

The Level 2 NVQ Diploma is the foundation of the trade. The Plumbing Craft and NVQ content covers health and safety, hot and cold water supplies, sanitation, drainage and domestic heating basics. City & Guilds says the 6189 Level 2 suits learners with some plumbing and heating knowledge and skills, usually gained in a supervised role.

At this level, you are working to show you can carry out routine installation and maintenance safely and to standard. Skilled plumbers can then trust you with standard tasks. You should still expect supervision on more complex jobs, particularly early on.

What does Level 3 add?

The Level 3 NVQ Diploma moves from carrying out work towards taking responsibility for it. City & Guilds says the Level 3 suits people already working in the trade with strong technical skills, minimal supervision and a good safety record.

The Level 3 route also adds a specialism. At City & Guilds, the 6189-31 NVQ has pathways including oil-fired appliances, solid fuel, biomass, solar thermal and water recycling, while the 6189-33 covers gas-fired water and central heating appliances. Each pathway has different content, so choose the one that matches the work you actually do.

Level 3 assessment is demanding on safety. The handbook lists key safety-critical activities that must be simulated, including pressure testing, thermal pipe joining, limited scope electrical work, gas, oil and solid fuel, and unvented water. The competence assessment in areas such as water regulations, unvented hot water, energy efficiency and gas is designed to meet the standards of the relevant bodies, so that it can support separate registration in those areas.

That last point is one of the most practical benefits of Level 3. Depending on the pathway, the qualification can lead to registration with the relevant scheme without further assessment or training. Check with your centre what your pathway covers, because this varies.

Is Level 2 enough?

It depends on what you want to do. Level 2 can be enough, but less often than people hope.

Level 2 NVQ Diploma may be enough if:

  • you plan to work for an employer, on supervised domestic or new-build plumbing
  • you want a Blue Card to get onto sites
  • you plan to stop there for now and top up later

You should aim for Level 3 if:

  • you plan to go self-employed and take responsibility for your own work
  • you want to work on more complex systems, such as unvented hot water
  • you want gas, or another heating specialism, built into the qualification
  • you want a Gold Card
  • you are thinking about supervising, assessing or teaching later

Our guide on how to become a plumber explains these options in a wider career context.

Which should you choose? Your situation, step by step

Use your starting point rather than the level number.

Your situation What to do
Leaving school, want to be a plumber Look for a Level 3 apprenticeship first
Adult, no experience, no employer Start with a Level 2 diploma only if you have a plan to find work, then move on to the NVQ
Working as a plumber's mate Ask your employer to support you onto the Level 2 NVQ Diploma, with a Trainee Red Card
3+ years' experience, no qualification Look at the experienced worker route to the NVQ
Have a Level 2 NVQ, working independently Move on to Level 3 and choose a pathway
Have a Level 2 or 3 college diploma only You need an NVQ route to get the card; talk to a centre about what can be recognised

If you are an adult, read our guide to how to become a plumber without an apprenticeship. It covers the routes in more detail.

Where does the apprenticeship fit?

The Level 3 Plumbing and domestic heating technician apprenticeship (ST0303) sits at the top of this picture. It has a typical duration of 48 months, and every apprentice must complete a Level 3 Diploma in plumbing and domestic heating.

JIB-PMES lists the apprenticeship standard and qualifications such as the City & Guilds 9189-03 Level 3 Diploma among those accepted for the Gold Card. Notice the difference in wording: this Level 3 Diploma is the apprenticeship's competence qualification, which is not the same as the 6035 Level 3 Diploma in Plumbing Studies. Both are called "Level 3 Diploma". Only one supports the Gold Card. This is exactly why you should always ask for the qualification number.

Why the qualification number matters

Several qualifications share almost the same title, and the numbers are changing. Before you pay for anything, write down the code and check three things.

  1. What kind is it? Ask whether it is an NVQ or competence qualification, or a knowledge diploma.
  2. Does the card scheme accept it? Check it against the JIB-PMES card pages, or call them.
  3. When does it close? City & Guilds' current dates are below.
Qualification Status (City & Guilds)
6035-02 Level 2 Diploma in Plumbing Studies Last registration 31 December 2027
6035-03 Level 3 Diploma in Plumbing Studies Last registration 31 December 2026; being replaced by 6036-03
6036-03 Level 3 Technical Occupational Entry in Plumbing and Heating (Diploma) The replacement for 6035-03
6189-11 Level 2 NVQ Diploma in Plumbing and Heating Last registration 31 December 2028
6189-31 and 6189-33 Level 3 NVQ Diplomas Last registration 31 December 2028

Also note that the heat pumps pathway on the 6189-31 has an earlier last certification date than the other pathways, so check that date if it applies to you.

The apprenticeship landscape is changing as well. Skills England marks ST0303 as being revised, and CIPHE announced in February 2025 that it had approval to develop new Level 2 and Level 3 plumbing apprenticeship standards. If you are starting soon, ask which version you would be on.

A plumbing student at a workshop table reading a workbook with fittings and a pipe bender nearby.
A college diploma builds real knowledge. Just make sure you know where it leads next.

What different people will actually ask you for

The right level also depends on who you need to satisfy. Each group looks for something different, and none of them uses the word "qualified" in quite the same way.

Who is asking What they usually look for Level that normally satisfies them
Principal contractor on a site A valid card for your occupation Blue Card from a Level 2 NVQ Diploma, or Gold from Level 3
WaterSafe or an approved contractor scheme Recognised plumbing qualification plus water regulations knowledge Level 2 NVQ with a Water Regulations certificate as the minimum; Level 3 recommended
Gas Safe Register Gas competence, assessed separately Your plumbing level alone does not satisfy this
An employer hiring a plumber Proof you can work unsupervised Usually an NVQ plus relevant experience
A homeowner Trust, reviews, registration and paperwork They rarely ask about levels, but they may check a register

The point is simple: nobody hires you for a level number. Each one wants evidence for a specific purpose. Work out which of these groups matters most to your plans, and aim for what they need.

Common myths about plumbing levels

"Level 3 means you are a better plumber than Level 2." Not by itself. A Level 3 shows wider competence and responsibility, but a plumber with a Level 2 NVQ Diploma and ten years of good work may well be better than someone newly qualified at Level 3.

"You must do Level 2 and Level 3 at college before you can work." No. Many plumbers start on site as an apprentice or a mate, and gain their qualifications through real work.

"A Level 3 diploma makes you fully qualified." Not on its own. A vocational diploma is not the same as a competence qualification, and JIB-PMES does not accept qualifications such as the 6035 for its cards.

"Level 3 includes gas." Only on some routes. The 6189-33 NVQ Diploma and the gas option on the apprenticeship do. Other Level 3 pathways do not, so gas is a separate step for those plumbers.

"You need a Gold Card to do domestic work." No law says so. Domestic customers rarely ask for a card at all, although your competence, insurance and registration all still matter.

What about the older qualifications?

If you trained years ago you may hold an older certificate. JIB-PMES accepts a range of older qualifications for the cards, including City & Guilds Craft Certificates for Blue, and Advanced Craft Certificates (596-2, 603-2, 617-2) and earlier Level 3 NVQs in Mechanical Engineering Services – Plumbing for Gold. Do not assume you need to start again. Send your certificates to JIB-PMES or check with a centre.

Overseas qualifications are treated differently. JIB-PMES says a standard UK ENIC statement of comparability is not accepted, and that you will need a full Industry Skills Statement with Primary Source Verification.

How long does it take to move from Level 2 to Level 3?

There is no fixed time, because the limit is the range of real work you can get. Someone working in a busy domestic firm can collect evidence faster than someone doing repetitive first fix on a large site.

To move faster:

  • Plan your evidence with your assessor at the start. Know exactly which jobs you need.
  • Ask for variety. Tell your employer which types of work you are missing.
  • Record jobs as you do them. Take authenticated photos, with customer and employer agreement, and keep your paperwork.
  • Choose the right pathway. A gas pathway will be far longer, since the 6189-33 is more than double the total qualification time of the 6189-31.

Frequently asked questions

Can a Level 2 plumber work alone?

There is no law that sets a level for working alone on general plumbing. In practice, a Level 2 NVQ Diploma holder may work unsupervised on routine work if they are competent and their employer agrees. Gas work and other regulated areas need their own competence, whatever your plumbing level.

Do I need Level 2 before Level 3?

City & Guilds lists Level 2 as the entry level for its Level 3 NVQ Diplomas, but says there are no formal entry requirements. Candidates should have completed Level 2 or have relevant experience. Your centre must be sure you have the potential and opportunity to achieve it.

Is a Level 3 diploma the same as a Level 3 NVQ?

No. A Level 3 diploma such as the 6035-03 is a vocational qualification assessed in a centre. A Level 3 NVQ Diploma such as the 6189-31 proves competence on real work. JIB-PMES says it does not accept Level 3 vocational qualifications such as 6035 for the Gold Card.

What is the difference between a Blue and a Gold plumbing card?

The JIB-PMES Blue Card is for qualified plumbers with a Level 2 NVQ, NVQ Diploma or accepted equivalent. The Gold Card is for those with a Level 3 NVQ, NVQ Diploma, apprenticeship standard or accepted equivalent. Both are valid for up to five years.

Can I do gas with a Level 2?

Plumbing level alone does not give you gas competence. Gas work needs its own assessment and Gas Safe registration. Some Level 3 routes, such as the 6189-33 NVQ Diploma and the gas option on the apprenticeship, build gas into the qualification, while others take it as a separate step.

Is Level 3 plumbing worth it?

For most people who plan to stay in the trade, yes. It supports the Gold Card, matches WaterSafe's recommendation for full competence, and opens the way to specialist work and supervision. If you only work under supervision, a Level 2 NVQ Diploma may do for now.

Will my college diploma count towards an NVQ?

Sometimes, in part. Ask your centre how it can recognise your prior learning, because a diploma may cover some knowledge content. You will still need evidence from real work for the performance units, and the qualification rules decide what can be counted.

How Nexis Academy can help

Nexis Academy is a City & Guilds Approved Centre (T91185) in Manchester. We currently deliver internal wall insulation training, with more trade and construction courses in development. We do not yet offer plumbing courses, so please register your interest to hear when that changes.

See also how the plumbing NVQ portfolio works and the G3 unvented hot water qualification.

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