FAQS – Gas Certificates of Compliance

  • Does DOSS undertake to refill or refund for gas cylinders?
  • No, we do not deal in gas.  This should be done at your local gas supplier.
  • Why, for compliance, do you want to change the configuration of my cupboard where my gas cylinder is stored?
  • We will advocate changes if the cupboard where the cylinder is housed is not adequately ventilated and if any plugs or electrical components are present.
  • Why must my gas cylinder be moved to be near a door?
  • This is to allow adequate ventilation.
  • What are the legally allocated positions for my gas cylinder?
  • See diagram below – Regulation: Sans 10887 5.2.3


  • Is it permissible for gas pipes to run through a roof?
  • It is permissible but only with the recommended type of piping, which can be costly.
  • What can be stored in my cupboard if it houses the gas cylinder?
  • No other items are permitted to be stored in the cupboard.
  • Why do I have to have unsightly valves for my indoor gas fireplace?
  • It is a requirement by law that there is to be a separate isolating valve installed at each appliance.
  • Do my gas cylinders need to be secured to a wall?
  • Yes, cylinders over 9kg, need to be secured either with a chain, or in a cage.  This prevents damage to the installation and injury to property and persons.
  • Is the gas pipe work cemented into the wall/plaster?
  • No, all pipe work undertaken by DOSS, is done as neatly as possible on the surface
  • How much gas can I store on my property?
  • 100 kg of gas for a free-standing domestic installation (unless approval and plans have been obtained from the Fire Department and Town Planning). Only 9 kg of gas is allowed for an apartment above ground floor level.
  • Can I store gas bottles in my garage?
  • Yes, gas bottles can only be stored in a garage. They cannot be connected to the gas installation.


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