Lead pipes and drinking water
A lead pipe is visible at the internal stopcock and the kitchen tap is fed from somewhere unseen. What length of lead has the survey not traced?
The survey has not traced the length of lead between the internal stopcock and the kitchen tap, or beyond the stopcock toward the road. A lead pipe is visible at the stopcock. The kitchen tap is fed from somewhere unseen. What you have is one visible piece of lead, not a measured run. The drinking-water guidance on lead is not a sample this visit took. The home survey records the pipe it could see. It has not mapped how much lead remains in the supply to that tap.
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 pipe is identified, where it is bare, by the look of the metal at a joint or a stopcock. That identification ends where the pipe enters a floor, a wall or a boxed-in duct. The unseen feed to the kitchen may be a continuation of the same lead, a change to another material, or a separate mains branch. The surveyor should not guess the metres or the route. They should say the visible lead stops being visible, and that the tap's supply was not followed.
Ask a plumber, or the water company if that is the route you choose, to trace what actually feeds the kitchen tap and what the incoming pipe is made of. Tell them lead was seen at the internal stopcock and nowhere else was confirmed. Do not cut, scrape or drill the pipe to prove the metal. The survey has already named it where it showed. Until the run is traced, any claim about how much lead the kitchen uses is unsupported.
What should you ask your surveyor?
- Where was lead pipe visible, and where did it pass out of sight?
- Did you trace the feed to the kitchen tap, or not?
- Was any drinking-water sample taken, or only the pipe noted?
What are the typical next steps?
- Limit the finding to lead seen at the internal stopcock.
- Do not state a length of lead you have not traced to the tap.
- Ask for the kitchen feed and the incoming pipe to be traced.
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 is under the sink, is the kitchen run then known?
Only the visible bit at that stopcock. Even a short distance of boxing, floor or wall can hide a change of material. The survey has not traced the rest, so the length of lead is still unknown. The unseen feed is still unknown.
Does a new kitchen tap prove the pipes behind it were replaced?
No. A new tap is a fitting on the end. It does not show the pipe in the wall or at the stopcock. The lead that was seen remains the lead that was seen, and the unseen length is still untraced.