Do Plumbers Put in Boilers? The Straight‑Forward Answer

If you’ve ever wondered whether a plumber can fit a new boiler, you’re not alone. Many homeowners assume any tradesperson can handle heating work, but the truth is a bit more nuanced. In the UK, plumbers are trained to work with water systems, and many also hold the necessary gas qualifications to install boilers safely. However, not every plumber has the right certifications, and hiring the wrong person can lead to costly mistakes or safety hazards.

What Qualifications Matter?

The key credential you need to look for is the Gas Safe Register licence. Only engineers listed on the Gas Safe Register are legally allowed to work on gas appliances, including boilers. Some plumbers carry this licence because they’ve completed additional training, while others focus solely on domestic water work. Ask for the engineer’s Gas Safe number and verify it online – it’s a quick step that saves a lot of trouble later.

Beyond the Gas Safe licence, a good boiler installer should have experience with the specific type of system you’re buying, whether it’s a combi, system, or regular boiler. Manufacturers often require installers to complete a certified training program to maintain warranty eligibility. So, even if a plumber is Gas Safe‑registered, make sure they’re also approved by the boiler brand.

What to Expect During a Boiler Installation

When you book a qualified plumber‑turned‑boiler‑installer, they’ll typically follow these steps:

• Site survey: They’ll check the location, existing pipework, and flue provisions to confirm the new boiler fits.
• Quote: A detailed price that covers parts, labour, disposal of the old unit, and any necessary pipe or wiring upgrades.
• Installation: Removal of the old boiler, fitting the new one, connecting gas, water, and electricity, and setting up the flue.
• Testing & safety checks: They’ll run the system, check for leaks, verify pressure, and complete the mandatory gas safety certificate.
• User briefing: A quick run‑through of how to operate the boiler, set timers, and maintain it.

Most reputable installers will tidy up the work area and leave you with all paperwork, including warranties and the Gas Safe certificate.

Remember that a plumber who isn’t Gas Safe‑registered can still do the plumbing side of things (like pipework or radiator installation) but must hand over the gas work to a qualified engineer. Some companies offer a joint service where a plumber handles the water side and a certified heating engineer handles the gas side – this can be a cost‑effective solution.

In short, yes, many plumbers do put in boilers, provided they have the right Gas Safe licence and brand approvals. Always verify credentials, ask for references, and get a written quote before any work starts. That way you get a safe, efficient install and avoid unexpected headaches down the line.