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On a shared supply, one pipe comes off the main and branches to several houses. Severn Trent says Victorian terraces usually share one supply pipe, pre-1940s semis often do, and many council estates were built with one large pipe along the backs of the houses, and that a shared supply pipe is the joint responsibility of every property it serves. A shared supply pipe leak can therefore land on several households at once, and it often shows up on only one of their bills.
The common section and your branch
What matters is where on the shared pipe the leak is. A shared supply has a common section, which every house on it uses, and branches that serve one house each. A leak on the common section is jointly owned. A leak on your branch is yours alone.
That is why the pipe is traced before the leak is located. The route, the branch points and each house’s stop tap are mapped. Once the leak is pinpointed, the report shows which section it is on, and every household gets the same copy.
Repair or separate?
A single leak on the common section can be repaired through one hole with a supply pipe repair. If the shared pipe is old, lead or has leaked before, it may be the time to give each house its own supply. That needs agreement between neighbours and a new connection for each house from Severn Trent, so talk to them early. Shared lead pipes are covered under lead pipe replacement.
What's included
- Stop tap and meter checks at each house
- Route of the shared pipe and its branches traced
- Common section and individual branches identified
- Leak located and marked
- Report showing which section is leaking
- One copy of the report for each household
- Repair or replacement options priced
- Option to give each house its own supply
How the options compare
Who pays
- Do it yourself
- Argued over
- Dig-and-hope operator
- Whoever called the plumber
- Proper leak detection
- Clear from where the leak is
Route of the pipe
- Do it yourself
- Unknown
- Dig-and-hope operator
- Guessed
- Proper leak detection
- Traced, with branch points marked
Evidence
- Do it yourself
- None
- Dig-and-hope operator
- An invoice to one house
- Proper leak detection
- A report every household can see
Long-term fix
- Do it yourself
- Patch and hope
- Dig-and-hope operator
- Patch
- Proper leak detection
- Repair, or separate supplies



