A plumber gets referrals by using a big advantage face to face trades often have: you’re inside someone’s home, at a moment they’re worried, and you put things right. That builds trust faster than any advert, and trust is the currency of referrals. The trick is knowing the two moments to mention referrals, and the wrong moment to avoid. Most plumbers get the timing backwards, and that’s why the work goes quiet.
This page is written for the plumber or heating engineer, not the homeowner. If you run a plumbing business and you’re tired of quoting against four other trades on Checkatrade, you’re in the right place. It sits under my bigger guide on how to get referrals for your business, and it goes deeper on the bits that matter for plumbers specifically.
Why are plumbers in a better position for referrals than almost any other trade?
Think about when a homeowner calls you.
The boiler’s packed up in January when it’s freezing cold. There’s water coming through the kitchen ceiling and it looks like it’s going to comedown. The downstairs loo won’t flush and the in-laws arrive on Saturday.
They’re stressed. They’ve let a stranger into their home. And then you turn up, sort it out, and the house is calm again.
That’s not just a well done job. That’s a big relief. And relief is the one of the most powerful feelings a client can have about you, because it comes with gratitude attached.
Gratitude is the raw material of every referral. And the currency as I said already is trust, and a plumber earns it standing in someone’s kitchen, not on a website. Electricians and builders get some of this. Plumbers get it on nearly every call-out, because nearly every call-out is a small emergency.
So why do so many plumbing businesses still buy leads?
Because they waste the trust they’ve earned and don’t know how to ethcially leverage it. Usually by asking at the wrong time, or never mentioning referrals at all.
What is the biggest mistake plumbers make with referrals?
Asking at the wrong moment. Or, more often, asking in a way that puts the homeowner on the spot.
The classic version is the text a fortnight later: “If you know anyone who needs a plumber, pass my number on.” By then the relief has faded, the invoice has been paid, and you’re just another name in their phone. Nothing happens.
The other version is the awkward one. The job’s done, the client’s reaching for their card, and you say “Do you know anyone else who needs work doing?” They freeze. They can’t think of anyone. Now both of you feel a bit uncomfortable, and that feeling gets attached to your name.
Neither of those is a referral programme. They’re guesswork. And there’s a better way.
When is the right moment to mention referrals on a plumbing job?
There are two. I’ve watched them work for thirty years, in my own businesses and in the trades I’ve helped, and the plumbers who use them stay booked up.
Moment one: the start of the job. Don’t ask. Just plant it.
When you arrive and you’re walking the homeowner through what you’re going to do, add one line. Something like: “Most of my work comes from recommendations. If you’re delighted when I’m done, I’d love it if you kept me in mind.”
That’s it. No pressure, no request. You’ve simply made them aware that you love being referred, and you’ve tied it to being delighted, which puts the responsibility back on you to earn it. They’ll be watching for it now, and when the job goes well, they’ll remember you said it.
I call this priming, and it’s the single most under-used thing in the plumbing industry. It costs nothing. It takes ten seconds. And it means the referral conversation at the end isn’t a surprise.
Moment two: the high emotional moment, when they’re delighted.
The boiler fires up. The hot water’s back. They say “that’s brilliant, thank you.” That is the moment. I call it a HEM, a high emotional moment, and it’s when a homeowner is most likely to act on what you say.
Now you remind them, gently, and you go down the safe route. I use a formula called PACT for this, which stands for Permission, Autonomy, Care and Trust. In plain English: you ask permission to mention it, you leave them completely free to say no, you show you care about the people they’d send you, and you keep the trust you’ve built intact.
It sounds like this:
“I’m really glad it’s sorted. I mentioned earlier that most of my work comes from people like you. If anyone you know ends up with a boiler problem, please feel free to pass my name on? No pressure at all.”
Notice there’s no “do you know anyone?” There’s no spot to be put on. It’s an invitation, and invitations get a completely different response from requests. Commands trigger resistance. Invitations trigger reflection.
What does this actually look like on a real plumbing job?
Let me tell you about Bob.
Bob was an old-school plumber. Tough-looking, the sort of bloke you’d think twice about arguing with. But he was also extremely polite, and that combination made people trust him straight away.
His work was good. Plenty of plumbers do good work. What set Bob apart was that he went out of his way to communicate everything really well, right from the outset. What he was going to do. What it would cost. When he’d be back. No surprises.
He knew how to make people feel good, and grateful, without ever laying it on thick. And at the end of a job, when the homeowner was clearly pleased, he always said something like:
“If you’re happy, then please recommend us to people who also need their boiler done. And we also do drains and complete central heating systems too.”
Look at what that line does. It’s conditional on them being happy, so it never feels pushy. It names the job they just had, so it’s easy to picture who else might need it. And it quietly tells them the other things Bob does, so the next referral might be a full heating system rather than a tap washer.
Bob never chased. He didn’t need to. His diary was full because his clients did the chasing for him.
Who else sends plumbers work without being asked?
Happy homeowners are the start, definitely not the whole picture, or normally the best kind of referral.
Letting agents need a reliable plumber every single week. Boilers, leaks, blocked drains across dozens of properties. Most agents are using whoever answered the phone last time, and they’d rather have one name they trust. I’ve written a separate guide on how to get estate agents to refer you work, and everything in it applies to letting agents too.
Builders, kitchen fitters and bathroom fitters need a plumber on nearly every job. Be the one who turns up when you said, does clean work and doesn’t make their life harder, and you become the default. When they ask you for a good electrician, give them a name. Give referrals and they come back.
And local Facebook groups. Someone in your area posted “can anyone recommend a good plumber?” this week. The name that gets typed there is worth more than any leaflet drop, and it only gets typed if your happy clients know you’d appreciate it. That’s what the priming line at the start of the job is for.
If you want the fuller picture on referrals from other trades and agents, my guide on how to get referrals as a tradesman covers it.
Should a plumber pay for referrals?
A referral programme with cash rewards sounds sensible on paper. Money off for every job someone sends you.
The problem is what it does to the recommendation. The moment your client’s neighbour finds out there was money in it, the recommendation stops being a favour and starts being a sales pitch. People feel that, even if they can’t put words to it.
A thank-you after the fact is different. A bottle of something, a handwritten card, a call to say “thanks, that job came through.” That’s gratitude, not a bribe, and it makes people refer you again. Bob never paid anyone a penny for a referral. He just made sure they were delighted, and told them what he loved.
What’s the one thing to do this week?
Add the priming line to the start of every job. “Most of my work comes from recommendations. If you’re delighted when I’m done, I’d love it if you kept me in mind.”
Then, when they’re delighted, use the PACT line. Keep it an invitation. Leave them free to say no.
Do that on every call-out for a month and see what happens to your diary. And if you want to know where your plumbing business is leaking referrals right now, take the free Where Are You Leaking Referrals quiz. It takes a couple of minutes and shows you exactly which gap to fix first.
Frequently asked questions
How do plumbers get more customers without paying for leads?
By turning every call-out into a referral source. Prime the homeowner at the start of the job, do work worth talking about, and use the moment they’re delighted to invite a recommendation. Add letting agents and other trades as regular referrers and the lead sites become a top-up, not the main supply.
What is a polite way for a plumber to ask for a referral?
Mention it at the moment the client is genuinely pleased, and make it an invitation they can decline. “If anyone you know has a boiler problem, feel free to pass my name on, we always appreciate it? No pressure at all.” That leaves them free to say no, which is exactly why they say yes.
Do referral schemes with discounts work for plumbing businesses?
Usually less well than expected. Cash or discounts turn a friendly recommendation into a paid one, and the person receiving it can tell. A genuine thank-you afterwards keeps the trust intact and keeps the referrals coming.
Is Checkatrade worth it for a plumber?
It can fill gaps, but understand what you’re buying. On a lead site you’re quoting against other plumbers for a homeowner who picked you from a list. On a referral you’re often the only person they’ve called. Use the platforms while you build the referral engine, then watch the gaps get smaller and your profit margins go up (because you aren’t paying the platform).