Typical Costs of Installing Water Mist Systems

There are various types of systems on the market, some better than others, some need much more builders work than others. Most claim compliance with the relevant standard BS:8458 domestic and residential water mist systems, but not all.  Some use an NHBC type approval scheme.

Your building control officer must be consulted at an early stage so that the customer selects and installs a system which will not be rejected. There is also a mobile system called PPS (personal protection system) which is intended for temporary applications to an occupant who is largely immobile and is at high risk, for example such as smoking in bed.

There is a commercial water mist standard BS8489 to which very few contractors have the capability to design and install.

Here at nationwide fire, we are fully qualified and very experienced in the design and installation of both types of watermist systems, and in addition are also one of very few who hold third party accreditation.

Water Mist Systems Accreditation

We are now fully third party certified for the installation of Dualmist systems. Working to the British Standards of BS8489 Part 7:2016 (Light Commercial) and BS8458:2015 and we can offer design and installation on all system types; Commercial, Residential and Domestic.

Working with IFC Group (International Fire Consultants) we have demonstrated our ability to design and install systems to the highest quality standards and are proud to be one of a small group of installers within the UK to have such level of certification.

See a copy of our IFCC 3197 Certificate.

So Nationwide have the most experience, in both disciplines, and give our customers the benefit of an outside monitoring body overseeing our work. Do any of our competitors for your work offer such a high level of quality and assurance?

This table of typical overall installation costs is based upon a dwelling where an open plan area on the entrance (ground) floor needs suppression as it is open plan to the stairwell and or kitchen

Pro’s and con’s

Ceiling mounted high pressure – less damage during installation, discreet fittings on ceilings, lower installation costs, no risk of obstructing nozzles with furniture, but high pressure systems risk explosive reactions to bursting. Many high pressure systems use aluminium nozzles which will corrode and may seize causing the internal holding pin to fail to release upon activation.

 Ceiling mounted low pressure – Nationwide’s products are all made of the best stainless steel, so no corrosion. Nozzles tried and tested by the BRE (building research establishment) for performance and for simulated aging testing and all have passed these tests. Less damage during installation, discreet fittings on ceilings, lower installation costs than high pressure systems, no risk of obstructing the nozzles, no risk of explosive bursting, our pipe work is  industry approved, tried and tested for over 40 years.


The customer has their own choice, but should seek agreement with their building control officer prior to committing to placing their order with someone offering a system which may not be the best solution.

Ask yourself these questions;

  1. Is the system fully compliant
  2. Does the system only use stainless steel nozzles
  3. Does the company hold third party accreditation
  4. Do you understand just how much builders work will be needed (for wall mounted systems)
  5. Will you be left with pipes in your house at near 1500 PSI (about 50 times as much as in your car tyres)


Freephone: 0800 028 9911
Alternative Tel: 0115 998 7391
Fax: 0871 266 8911
E-mail: [email protected]

Telephone: 0800 028 9911
Fax: 0871 266 8911
E-mail: [email protected]

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