Lead pipes and drinking water
A lead rising main is visible in the cellar and the kitchen has been repiped in plastic. Why does the kitchen pipe not retire the lead in the cellar?
The kitchen plastic does not retire the lead because the rising main in the cellar is still lead and still upstream of that new pipe. Water can pass through the lead before it ever reaches the plastic. The survey has seen the lead main and the change of material. It has not tested the water at the tap, has not traced every branch, and has not said the drinking supply is clear of lead. The Drinking Water Inspectorate's concern is lead in the water people drink. A new kitchen run does not remove the main.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
Repiping a kitchen is often the visible length under the sink. The rising main brings the supply in. If that length in the cellar is lead, the renewal has stopped short of it. Plastic downstream does not change the metal the water has already travelled through. The survey can point to both pipes. It cannot sample the tap, and it cannot say how much buried pipe is still lead.
Ask the solicitor what the searches and any water-company note say about the supply, and arrange a water test if you need to know about lead at the tap. Tell them the kitchen plastic has not retired the cellar main. Do not describe the survey as a drinking-water result. The home survey saw the lead. It did not replace it and it did not clear it.
What should you ask your surveyor?
- Where is the lead rising main visible, and where does the plastic start?
- Did you test water at the tap, or only see the pipes?
- Has the kitchen repipe been recorded as not retiring the cellar lead?
What are the typical next steps?
- Treat the cellar lead as still in the supply.
- Do not read the kitchen plastic as a retirement of that main.
- Ask about a water test rather than treating the survey as one.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
If the kitchen taps look new, is the drinking water dealt with?
New taps on plastic pipe do not remove a lead rising main in the cellar. The survey saw that main and did not test the water. The Drinking Water Inspectorate is concerned with lead in drinking water, which a fitting in the kitchen does not retire. The upstream lead is still there to see. A new tap is not a sample.
Can the lead in the cellar be painted and then ignored?
No. Paint would not retire the pipe, and the survey has not suggested covering it over. The lead rising main is a supply pipe. The kitchen plastic starts further along. Leave identification of the water to a proper test. The home survey's point is that the lead is still visible and still not removed.