Compliance Marketing for Plumbers
One part of your work is legally gated and almost nobody markets it
The least regulated trade on this site, with two exceptions
A bathroom refit is £1,850. A boiler replacement, £1,670. A shower installation, £840. A leak repair, £235. A blocked drain, £215.
Plumbing is unusual on this site for how little of it is formally gated. Anybody can unblock a drain. Anybody can fit a tap. There is no licence to be a plumber in the UK, which is a fact most homeowners find surprising when they hear it.
There are two significant exceptions, and both are commercially valuable precisely because they are exceptions.
Unvented hot water cylinders. Installing or working on an unvented system generally requires specific competence — the G3 qualification — and the work is notifiable under building regulations. An unvented cylinder installed by somebody unqualified is a genuine safety matter and a genuine problem at sale.
Water regulations. Installations must comply with the Water Supply (Water Fittings) Regulations, and certain work is notifiable to the water undertaker. Backflow protection, in particular, matters and is widely ignored.
Neither is understood by customers at all. Which means a plumber who holds those qualifications is carrying a real advantage over a large part of the local competition and, in almost every case, saying nothing about it.
How to turn that into work rather than a badge
Explain what unvented actually means to a homeowner. Most people with a pressurised system do not know what they have, do not know it needs periodic attention, and do not know that the person who installed it needed a specific qualification. A clear page on that produces both installation work and the servicing that follows it.
Publish your qualifications with their meaning attached. G3, water regulations, and whichever approved contractor scheme you belong to — each with one line saying what it lets the customer avoid.
Own the landlord plumbing obligations. Legionella risk assessment is a real duty for landlords of rented property, widely misunderstood and frequently sold badly by others. There is a straightforward, honest version of this that agents will thank you for.
Say what unqualified work costs later. Not as a scare — as the practical position at sale, at insurance claim, and at the point a system fails.
Be plain about what you are not. Gas work needs Gas Safe registration; if you do not hold it, saying so clearly is a mark of competence rather than a weakness.
The ratio
A bathroom is £1,850. Our Seen package is £29 a month — £348 a year. One bathroom covers more than five years.
On unvented work specifically: cylinder installation and servicing is higher-value, less price-competitive and far less crowded than general plumbing, precisely because a proportion of the local trade cannot legally do it. Making that visible is one of the few genuinely defensible positions available in a trade with no barriers to entry.
What we’d actually build
An unvented systems page explaining what they are, why the qualification exists, and what servicing involves.
A qualifications page with meanings, rather than a row of logos.
A landlord plumbing obligations guide including legionella risk assessment, written honestly rather than as an upsell.
A page on what happens at sale when work has been done without the required competence or notification.
A clear scope statement — what you do, what needs a Gas Safe engineer, what needs a specialist.
What good looks like at twelve months
- Unvented work identified as a distinct, better-paid part of the business
- Qualifications explained in customer terms everywhere they appear
- A landlord section producing agent enquiries rather than only homeowner ones
- Fewer conversations where you are compared against somebody who cannot legally do the job
- Servicing work arriving from cylinders you did not install
The mistakes we see most
Treating qualifications as a badge. G3 means nothing to a homeowner until somebody explains it.
Ignoring the landlord duties. They are recurring, they are researched, and they arrive a portfolio at a time.
Selling fear. The honest version of this converts better and survives scrutiny.
Claiming scope you do not hold. In a trade with no licence, being precise about what you are qualified for is itself a differentiator.
The first ninety days
Weeks 1–4. The unvented page and the qualifications-with-meanings page, which together carve out the defensible part of your market.
Weeks 5–8. The landlord obligations guide, aimed at agents rather than homeowners.
Weeks 9–12. The point-of-sale page and a clear scope statement, plus annual review dates on anything regulatory.
At ninety days the measure is whether unvented and landlord work has become a visible, separately identifiable part of your enquiries.
Where this lands in Gaffer
Installs record the appliance and system type, so unvented cylinders sit on a schedule for their periodic service rather than being remembered.
Because certificates and notifications attach to the property, the paperwork a customer needs years later at sale is retrievable rather than lost.
And landlord obligations recorded against a client mean the annual conversation with an agent starts from a list of properties and dates rather than from scratch.
Building regulations that touch plumbing more than people expect
Beyond the two exceptions above there is a set of requirements that catch out both customers and plumbers, and they are worth being the person who understands.
Bathrooms and wet rooms involve electrical zones, extraction and, where a room is created rather than refitted, notification. Moving a soil pipe or altering below-ground drainage generally engages the drainage requirements and can be notifiable. A new bathroom in a loft conversion or a garage conversion sits inside a larger notifiable project entirely. Water efficiency requirements apply to fittings in new work.
None of that stops a straightforward bathroom refit. All of it can surface when somebody moves a bathroom to a new part of the house, converts a garage, or discovers at sale that a downstairs shower room was created without anything being notified.
The commercial point is the same as everywhere else on this page: the customer does not know, and the plumber who raises it early looks like the competent one before any work has started.
There is also a straightforward differentiator in scalding and thermostatic protection. Requirements around hot water temperature at baths in new work exist for good reasons, they are frequently ignored, and a plumber who fits and explains a thermostatic valve is doing something visible, safe and easy to describe to a customer with young children or an elderly relative.
Questions plumbers ask
Is unvented work really that different? It is better paid, less crowded and legally gated, which is an unusual combination in this trade.
Should I mention that plumbing is unregulated? Carefully and factually. It explains why your qualifications matter, which is the point.
Do landlords actually buy legionella assessments? The duty is real and widely misunderstood. Written honestly it is welcomed; oversold it damages you.
What if I do not hold G3? Then the page says what you do hold. Precision is the asset here.
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