First decide whether it is an emergency

Active uncontrolled leakage, sewage backup, loss of heating in dangerous weather or a suspected gas-related issue require a different response from a dripping tap. If it is safe, close the relevant isolation valve or the main water supply and protect electricity from water. For gas or electrical danger, contact the appropriate emergency service rather than treating it as a routine plumbing booking.

Take photographs of the visible damage and note the time. If the property is rented or insured, notify the responsible party promptly; authorisation rules can affect reimbursement.

  • Ask who is being dispatched and the realistic arrival window.
  • Confirm the call-out charge, minimum labour time and after-hours premium.
  • Ask whether parts and diagnostic work are additional.

Compare the scope, not just the hourly rate

A low hourly rate is not meaningful without an estimate of time, travel, parts and the work needed to restore finishes. The cheapest repair may also be a temporary patch when a durable repair requires access or replacement.

For planned projects, request a written description of the materials, connection method, testing and responsibility for making good walls, tiles or cabinetry. If another trade is needed, establish who coordinates it.

A precise quote before any inspection can be less trustworthy than a clear price range with stated assumptions.

Look for disciplined diagnosis

Water can travel far from its source. Damp at one point does not prove the pipe directly behind it has failed. A careful plumber considers fixtures, seals, supply and waste lines, heating systems and building-envelope sources before opening finishes.

Ask what evidence supports the diagnosis and whether non-destructive tests are appropriate. Leak detection technology can reduce unnecessary damage, but tools do not replace experience.

Verify the business and paperwork

You should know the legal business providing the work, how to contact it and what document you will receive. For larger projects, ask about relevant insurance and how defects are handled.

The invoice should describe labour and materials clearly enough to establish what was done. Keep photographs, quotations, approvals and invoices, particularly where the work may affect insurance or a landlord-tenant dispute.

  • Legal business name and contact details.
  • Written price basis and VAT treatment.
  • Workmanship remedy or warranty terms.
  • Evidence of relevant insurance for higher-risk work.

Check the repair before sign-off

Ask the plumber to demonstrate that the repaired system has been tested under realistic conditions and to explain any monitoring needed. Check accessible joints, pressure, drainage and affected fixtures before finishes are closed.

A competent professional may recommend further work. Ask which items are urgent, which are preventive and what evidence supports each recommendation.