Lead pipes and drinking water
One short lead joint remains under the sink and the rest of the visible pipework is copper. What length of pipe between the stopcock and the road was not traced?
The length between the stopcock and the road was not traced. One short lead joint under the sink was visible, and the rest of the visible pipework is copper. Visible copper does not describe the buried supply. The survey has recorded the joint it could see. It has not followed the pipe outside, not said the incoming main is copper, and not sampled the water. The unseen length is the run from the stopcock toward the road. A short joint indoors is not that run.
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?
Lead often survives in the last buried length, or in a short joint, after the pipes people can see have been changed to copper. The sink joint is evidence that lead is still present somewhere in the installation. It is not a measurement of how much, and it is not a map. The surveyor did not excavate the path and did not lift the stopcock box to identify the main. Identification of the buried length needs access the inspection did not have.
Tell the solicitor about the lead joint under the sink and that the supply toward the road was not traced. If you need to know what that buried length is, ask a plumber who can trace it, and keep any water-quality question separate from the survey. Do not describe the house as fully copper because the kitchen looks copper. The survey has not said that. The untraced length remains untraced.
What should you ask your surveyor?
- Did you see only a short lead joint under the sink?
- Was the pipe between the stopcock and the road left untraced?
- Have you avoided calling the visible copper a complete replacement?
What are the typical next steps?
- Record the lead joint as the piece that was seen.
- Do not assume the buried supply to the road is copper.
- Ask a plumber to trace that length if it must be known.
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 stopcock itself is brass, is the road length copper?
Not from this visit. Brass at a stopcock is the fitting in view. The length between that stopcock and the road was not traced. The lead joint under the sink already shows that copper indoors is not the whole storey. The buried run stays undescribed.
Should you cut the joint out to see how long the lead is?
No. The survey did not cut it, and you should not treat a hacksaw as the inspection. The untraced length is outside, between the stopcock and the road, not the short piece under the sink. A plumber can trace what the survey left unseen.