This is the bit that drives people mad: you get a letter, you open the meter box, it’s wet, and suddenly you’re thinking “Hang on… is this my pipe or Thames Water’s?” And of course it always happens when it’s raining sideways and you’ve got school run traffic on the A21.
I’m Stuart — sole trader, based in Orpington. I’ve been doing leak notice jobs and private supply pipe repairs around Petts Wood, Chislehurst, Bromley Common and the BR6 back roads for years now. The job is rarely just “fix a leak”. Most of the time it’s work out where responsibility sits, prove it, then do the repair properly so you can move on.
If you’re standing near the boundary box right now and you want a quick sanity check, call me on 07706 889 614. If you’re stuck near Orpington Station or by the Glades in Bromley and need a quick plan before you lose the afternoon, I’ll talk you through what to check (no faff, no upsell chat).
There’s a reason people argue about this — because the words are confusing and the pipes are literally buried. But here’s the practical way I explain it on-site:
Most of the time: Thames Water is responsible up to the boundary / external stop tap / meter position. The private supply pipe is the bit from that boundary point into your property (garden, drive, under the floor).
Where it gets messy is shared supplies, old terraces, or when the “boundary” isn’t obvious. That’s when you either end up guessing… or you get it properly checked and stop the blame game.
If you’re here because you’ve received a notice and you want the panic-reducer page, jump here: what to do if you’ve had a Section 75 letter.
And if you already know it’s on your side but you can’t find it, don’t dig on a hunch. This is where detection saves your wallet: non-destructive leak detection (Orpington & Bromley).
This one catches people out all the time. I’ve had calls where someone’s lifted the lid, seen water pooled in the box, and they’re already halfway through writing an angry email. Then we do the boring bits — isolate, test, listen — and the leak’s actually two metres into the drive on the private run.
Those boxes can fill up from surface water, heavy rain, or just the ground holding moisture. Orpington clay doesn’t exactly drain like a gravel driveway in Spain, does it? So wet box ≠ proof.
Meter behaviour, isolation checks, and a quick look at how the property is laid out. Streets off Crofton Road and some of the older BR2 pockets can have odd runs that aren’t where you’d expect.
It’s common in older builds: one feed comes in, then splits. If the leak is on the shared bit, you end up with neighbour drama. This is where pinpointing the exact section helps everyone calm down.
If you suspect that (boundary box confusion / shared run), the clean next step is to book a non-destructive leak locate so you’re not arguing on assumptions.
Sometimes the “leak” is a quiet internal issue — a toilet valve, a stuck overflow, a slow drip you never hear. The meter doesn’t lie, but it doesn’t tell you where.
If you’re stood by the meter right now and it’s still moving with everything off, don’t guess. If you’re near Petts Wood station or stuck in traffic by Bromley South, call 07706 889 614 and I’ll help you work out whether this is likely private, shared, or internal — and what to do next.
When I started SKR Plumbing & Heating in 2020, I expected it to be the usual mix: heating issues, leaks, refurb bits, landlord repairs — the normal stuff.
Then the leak notice calls started coming in. The pattern was always similar: someone stressed, a letter (or a bill) that didn’t feel fair, and a lot of confusion about what’s private vs not. Half the time I was basically translating the situation into plain English before I even picked up a tool.
I’m not interested in making things sound scarier than they are. I’d rather say, “Look, this could be a small leak, it could be shared, here’s how we find out,” than give you that vague “we’ll see when we get there” nonsense.
A lot of plumbers can fix a pipe. The difference is whether they fix the right pipe, in the right place, with a method that won’t leave you repeating the whole mess in six months.
Responsibility first. If it’s clearly Thames Water’s side, I’ll tell you that. If it’s your run, we work out the least disruptive way to repair or replace it.
Not because I’m precious — because driveways and patios are expensive. If you need locating first, this is the clean path: find the leak without tearing up the whole place.
Old lead, old steel, clay movement… those details matter in Orpington/Bromley. Sometimes a patch is fine. Sometimes it’s just kicking the can down the road.
Wet box, constant meter creep, no visible leak. Turned out the leak was on the private run under the first slab of the drive. We located it, lifted one section, repaired properly, and the meter settled down immediately. The box was wet because… it had rained for two days straight.
Two neighbours, both convinced it’s the other person’s problem. Meter tests and layout check showed a shared section before the split. Once it was proven, the temperature dropped instantly — nobody wants to be the “bad neighbour”, they just want certainty.
Big bill, “leak” assumed underground. In the end it was an internal fitting quietly running. Not glamorous, but it’s exactly why you don’t start digging on day one.
If your situation started with a letter and a deadline, the step-by-step “what now?” page is here: Section 75 leak notice help.
You’re not booking “a guess”. You’re booking a proper process to work out responsibility and fix the issue.
If you want the technical “how we locate it” page, it’s here: leak detection service in Orpington & Bromley.
Long CTA: Call 07706 889 614 and tell me your postcode and what you’ve seen at the meter. If you’re in a hurry (work, school run, selling a house), say that — I’ll tell you the fastest sensible next step.
I’m not pretending a sole trader is perfect for every job. If you need a full civils crew tomorrow morning for a massive renewal, I’ll tell you that. But for this specific problem — responsibility + clarity + targeted repair — people usually want: one person accountable, straight answers, and a plan that doesn’t wreck the place.
Most of my work comes from repeat customers and local recommendations. That only happens if you’re honest. So if I think it’s not your side, I’ll say it. If I think you need locating before any repair, I’ll say that too.
Not “marketing FAQs”. The real ones — sometimes asked in a panic, sometimes asked at 11pm.
Often, yes — but not always in the simple way people think. Shared supplies and unclear layouts can mean “after the meter” doesn’t automatically equal “your private run only”. That’s why isolation checks and layout knowledge matter.
I wish it did. In reality those boxes can fill from rain or ground water (especially in clay soil). The meter behaviour and isolation tests are what tell the truth. Wet box on its own is just… wet box.
Usually by checking meter behaviour, isolation points, and how the properties are fed. In some older streets, the supply run makes no sense until you’ve seen a few of them. If it’s unclear, locating is the cleanest way to prove it.
Not always. If the leak is obvious and accessible, we can go straight to repair. But if it’s “no visible leak”, detection stops you paying for unnecessary digging. This explains it properly: how we locate hidden leaks.
Then speed matters. Start with the “what to do now” page and then call me with your postcode and the wording on the letter: Section 75 leak notice help.
Final CTA: If you want the straight answer on responsibility and the fastest route to a proper fix, call 07706 889 614. Tell me your postcode and whether the meter moves when everything is off. That one detail usually tells us a lot.
