Electrics and gas
The stopcock could not be turned. Why does that matter before exchange?
Because it is the valve you would use to isolate the incoming water if a pipe fails. If it will not move, you may not be able to stop a leak without the water company’s valve outside. The survey did not force it, and forcing it is not the inspection. A Gas Safe engineer is for gas, which is HSE’s gas question, not for freeing a stopcock.
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?
Stopcocks sit under sinks, in cupboards, or in the pavement. They seize when they are painted, corroded, or left for years. A surveyor who cannot turn one easily should stop. Snapping the spindle floods a house that is still the seller’s. The report should say where the valve is and that it was not operated, or that it would not move. That is a maintenance limit, not a test of every pipe. The survey has not pressure-tested the plumbing. Do not lean on the handle during a second viewing to “finish the job”.
Before exchange, ask the seller to have a plumber free or replace the valve, or accept that you are buying a tap you cannot rely on. Get that in writing through the solicitor if it matters to you. The outside water-company valve is not yours to prove on the day, and the survey may not have seen it. Do not confuse this with a gas emergency control. Different pipes, different people. There is no gas tightness test inside a stiff stopcock. There is also no electrical code. Keep the note on the plumbing. A valve that moves freely, if someone later shows you that, is still not a certificate that the buried supply is sound.
What should you ask your surveyor?
- Where is the stopcock, and did you try to turn it?
- Did it move, or did you stop rather than force it?
- Is any leak at the valve separate from stiffness?
What are the typical next steps?
- Do not force the stopcock.
- Ask the seller, through your solicitor if you need it agreed, to have the valve made workable before you rely on it.
- Use a plumber for the valve. Do not instruct a gas engineer for it.
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
Is a stiff stopcock a collapsed drain?
No. It is the incoming water valve. Drains are a different system.
If the kitchen tap runs, is the stopcock fine?
No. Flow means water is arriving. It does not mean you can shut it off.