Electrics and gas
A gas pipe disappears into a wall chase with no label. Can the survey trace it?
No. The survey cannot trace a buried pipe, and it should not condemn the chase because the route is hidden. What you have is a pipe that enters the wall and a survey that did not test the installation. A Gas Safe registered engineer is who HSE expects to work on domestic gas.
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?
Chases hide the run between a meter and a boiler, hob or fire. Without openings, labels or a diagram, nobody at a visual inspection can say where the pipe turns, whether it is sleeved, or whether it has been notched into joists. The surveyor reports the visible ends. They do not scan the plaster, and they do not do a tightness test. Do not start opening walls before exchange to satisfy curiosity. If the route matters, an engineer can advise what it is reasonable to see, and your solicitor can ask the seller whether any diagram exists.
Absence of a label is not a conviction. Presence of a label would still not be a test. Owner-occupied sellers are not under a landlord’s duty to hand you a gas safety record with the fittings list. If you need the appliances declared fit to use, book a Gas Safe engineer and tell them a length is concealed. Concealed does not mean they must condemn it, and visible does not mean they can skip it. The survey’s job ends at the limit: pipe seen entering a chase, route not traced, installation not tested.
What should you ask your surveyor?
- Where did the visible pipe go into the wall, and where did it come out, if it did?
- Did you trace it? Please say no if you could not.
- Are you stopping short of condemning the chase?
What are the typical next steps?
- Do not chase the plaster off to find the pipe.
- Ask the seller for any diagram. Do not expect the survey to have drawn one.
- If appliances need a safety check, use a Gas Safe engineer and mention the hidden run.
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
Does copper paint on the plaster prove the pipe is sound?
No. A stain might be a clue. It is not a tightness test and not a traced route.
Is an unlabeled pipe the same as a leak?
No. The survey did not find a leak by failing to see a label.