Discuss Gas isolation valve with test point in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Should you be giving that intel out unless you know the OP is GSR?You can get one from BES
Gas Ball Valve - 22mm Compression Brass - 19950 | BES.co.uk
If you are not GSR you shouldn't be fitting it though, get a GSR person to fit.
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