Fire Installation

National Building Regulations Part W – Fire Installation


Part W of the SANS 10400 Building Regulations is intended to keep people and property safe in the event of a fire. These have to be inspected and approved by the local authority and permission needs to be granted before any water fire fighting system is connected to the water supply.

Listed below are the main regulations and requirements:

W1 – Fire Installations

All approved fire installations shall be connected to a communication pipe supplied by the local authority: Provided that such local authority may, subject to any conditions it may consider necessary, allow such fire installation to be connected to ––
.    (a)  any approved alternative source of supply; or
.    (b)  any source of non-potable water where such water is not to be used for domestic or any other 
purpose which, in the opinion of such local authority, might give rise to a health hazard.

W2 – Supply of Water

Water shall not be taken from a supply system for use in any fire installation, unless ––
.    (a)  an application has been made to the local authority for the supply of such water and such application has been granted; and
.    (b)  the use of such water and such fire installation complies with any conditions imposed by the local authority.
W3 Design of Fire Installations
In any fire installation ––
(a) adequate and suitable connection and means of measuring water pressure shall be provided;
.    (b)  so many isolating valves shall be provided to control the flow of water to the installation, and to such points within the installation, as the local authority may require; and
.    (c)  the quantity, pressure and rate of flow of water shall be adequate for the supply of any hose reel, hydrant or sprinkler system connected thereto.

W4 – Deemed-to-Satisfy Requirements

The requirements of Regulation W3 shall be deemed to be satisfied where any fire installation complies with SANS 10400-W: Provided that where a local authority is of the opinion that it is essential for the fire installation to be the subject of an acceptable rational design prepared by an approved competent person, such local authority shall, in writing, notify the owner of such site of its reasons for the necessity for such design, and may require such owner to submit for approval plans and particulars of a complete fire installation, based on such design.


fire installation
A typical fire installation in a factory showing the correct signage


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  1. Desiree Phillips

    I noticed fire hydrants at a property which seems they have not been tested in ages. Who can assist me in having these checked for safety requirements and if they actually work and are still linked to water supply?

    • Hi Desiree, Any fire related issues are not part of the SANS10400 regulations, this falls under the fire protection laws. I suggest you contac your local fire department and ask them.

  2. Hi

    Where can I find the details of the size of demarcation underneath a fire extinguisher? Is it a sans regulation?
    thank you

    • Probably Part W of SANS 10400 that covers fire installations. I will add content to this page asap. However, stranger, the term “fire extinguisher” doesn’t feature… Part T – Fire protection – is another possibility. If you can explain more clearly what you mean by “size of demarcation” I’ll see if I can answer the question for you. Do you mean how much space it needs or how big it must be – or what?

  3. Hi. Is it a sans/ fire requirement that computer server rooms must have raised/ false floors.

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