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Gas Safety

Exam revision materials for Plumbing Level 2&3 and ACS Gas Safety test

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Unsafe Situations

Dealing with Unsafe Situations

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Safety Devices and Controls

Air/Gas ratio valves

Appliances Controls

Flame Supervision Devices FSD

Gas Controls

Gas Meter Controls

Safety Cut-off Devices

Spare Part Identification


Open-vented System


Gas Appliances

Ventilation Sizing

Unsafe Situations

Dealing with Unsafe Situations

Emergency Notices and Warning Labels

Gas Leak




Tightness Test

Gas Performance

Gas Rate

Heat Input

Gas Supply

Gas Meters

Gas Pipework

Gas Fittings and Pipes

Gas Supply


New Installation

Pipe Protection

Pipework Sizing

Chimney and Flue


Flue Construction

Flue Inspection and Testing

Flue Terminals

Flue Types


Carbon Monoxide Poisoning

Combustion Process

Natural Gas

Portable Combustion Gas Flue Analysers


Components and Safety Devices

Landlord's Gas Safety Record

Landlord's Gas Safety RecordLandlord's Gas Safety Record notes for completion
  • this document has 3 copies for: landlord, tenant, installer
  • produced to facilitate the requirements of Regulation 36
    • requires Landlords to maintain a record of when each appliance is checked and any defects found
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Domestic Gas Safety Inspection Report

Domestic Gas Safety Inspection Report
  • gives a record of work carried out by a gas engineer:
    • commissioning of gas installation
    • reconnecting and relighting gas appliances
    • safety check for property vendors
  • Contains:
    • tightness testing
    • emergency controls
    • appliance flue and ventilation
    • gas user's signature
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Electrical Cross-Bonding Record

Electrical Cross-Bonding Record
  • issued when non standard earthing arrangements fitted within 600mm of the meter outlet
  • Actions:
    • inform the user of the lack of main equipotential bonding
    • complete the notice and ask for signature, then sign yourself
    • advice the user that a qualified contractor should be contacted
    • hand the customer a copy, retain the other
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Immediately Dangerous (ID)

  • Tightness test fail
  • Spillage test fail
  • Flueing/ventilation/combustion defects
  • If not possible to rectify:
    • Inform the customer
    • Disconnect and seal with permission
    • 'DO NOT USE' warning label
    • if no permission:
      • it is their responsability to use
      • turn off the appliance
      • contact Gas Emergency Service
      • obtain a job reference number from the operator
    • Complete 'Warning Notice':
      • details of the fault
      • action taken
      • customer's to signature
      • issue a copy to the customer
      • keep a copy
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At Risk (AR)

  • Situation which COULD CREATE risk to life or property
  • If not possible to rectify:
    • Should not be used
    • 'DO NOT USE' warning label
    • With permission - TURN OFF the gas supply
    • if no permission:
      • It is their responsibility to use
    • Complete a 'Warning Notice':
      • Details of the fault
      • Action taken
      • Customer's signature
      • Issue a copy to the customer
      • Keep a copy
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Not to Current Standards (NCS)

  • The appliance is operating safely but NOT in accordance with current Regulations
  • May be left in operation
  • 2 NCS = AR
  • Actions:
    • Advice to fix the defects
    • Issue Not to Current Standards notification
  • Not to Current Standards Method of Notification:
    • Advice Notice (copy to the owner)
    • Keep a copy
    • Customer's signature
    • Keep record for 6 years
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Concern for Safety

  • 'The Concern for Safety' label
  • The appliance should be tested by a Gas Safe Registered (former CORGI) gas installer befor to be used
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  • For not using or defect to be remedied lies with the occupier of the premises
  • Gas Operative must inform the responsible person about the unsafe situation
  • All actions gas operative wish to take are to be with responsible person permission
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Warning and Safety Notices/Records

  • All notices incorporate duplicate copies
  • Notices may be required as proof of performance in a court of law
Warning Advice Notice
  • issued in conjunction with 'Do Not Use' label in order to reinforce it
  • informs the user that the installation is Immediately Dangerous or At Risk and should be disconnected or turned off
  • Contains:
    • detailed analysis of the gas safety fault
    • gas company details
    • Gas Safe registration number
    • date and time of issue
    • gas user's details
    • gas user's signature
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