How to classify gas defects as Immediately Dangerous, At Risk, or Not to Current Standards and the safety steps to take.
GIUSP has two unsafe classifications: Immediately Dangerous (ID) and At Risk (AR). Assess the actual installation within your competence, including the combined effect of defects. Seek further competent guidance immediately if unsure.
ID means immediate danger to life or property if the appliance or installation remains connected to the gas supply. It need not be firing: a gas escape can be dangerous with a burner switched off. Where the defect cannot be rectified, seek permission to disconnect and seal the supply, complete the warnings and follow the applicable refusal route.
AR describes a fault that could create future danger. Where turning off removes the risk during use, seek permission for that action and complete the warning label and written notice. A limited set of AR installation defects instead requires referral because turn-off does not reduce the risk. That route uses the specified written warning and referral, without a danger/do-not-use label.
A safe standards shortfall may be recorded separately as NCS. It is outside the GIUSP unsafe categories. Being old, passing one test or having worked previously does not establish that an installation is safe.
Use the current procedure for the full actions. This note distinguishes the decisions; it does not replace site assessment or the required competence.
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