Book A Service


BS9990:2015 British Standard for Dry Risers & Fire Hydrants

Dry Riser Regulations

BS9990:2015 is the current British Standard that regulate design, installation, testing and maintenance of dry risers. It details the legal requirements for the installation and maintenance of dry risers in the UK.

BS9990  (Non-automatic firefighting systems in buildings Code of practice) dictates that dry risers should have an operating pressure of 12 bar and be visually inspected every 6 month and tested annually.

When Do You Need Dry Risers?

Dry risers need to be installed in buildings where the floor is between 18 & 60 meters above ground level as dictated by Approved Document B (Fire Safety) of the
Building Regulations (England & Wales). This is roughly equivalent to buildings of more than 6 stories and less than 17.

Legal Requirements for Installation and Maintenance of Dry Risers

BS9990 gives requirements and recommendations for non-automatic fire-fighting systems in buildings. It covers good practice in matters affecting the design, installation, testing and maintenance of such systems including wet and dry fire-fighting mains.  At Dry Risers Direct we design, install and maintain all our dry riser projects to the BS9990:2015 Standards.

BS9990 was first published in 2006, with the latest edition release in January 2015 by BSI Standards Ltd.  The latest release of 2015 does not give guidance on when and where Wet and Dry riser systems are needed, this guidance is issued by Building Regulations.
BS9990 deals solely with design, provision, installation and maintenance. Guidance on hose reels and foam inlets remains in the revised BS 5306 part 1). The key areas that were revised in the 2015 version are flow tests and pressures, rising and falling mains, pumps, maintenance and shut off pressures.


BS9990:2015 Summary of Key Points

The following is convenient summary of the key points in the BS9990:2015 standards for fire fighting systems, in particular the standards relating to Dry Risers. 

BS9990:2015 states that:

  • Dry fire mains should have an operating pressure of 12 bar.
  • A dry fire main should be fitted with a two-way inlet breeching for 100 mm mains. Each breeching should conform to BS5041-3 and be located in an inlet box conforming to BS5041-5, the enclosure must be between 400 mm and 600 mm above ground level.
    Floor-mounted (horizontal) inlets are not suitable for the majority of fire main applications.
  • Drain valves Inlet breechings should be fitted with a 25 mm drain valve, in accordance with BS5041-3.
  • An air release valve should be installed at the top of all vertical mains in order to vent air from the main.
  •  A landing valve should be provided at each floor level, including the ground floor level.
  • A landing valve should be installed with its lowest point about 750 mm above floor level.
  • Landing valves for fire mains should preferably be protected by, and installed within, a box in accordance with BS5041-4.
  • Landing valves for dry mains should conform to BS 5041-2. Outlets should be flanged rather than directly threaded to allow for ease of maintenance.
  • Position of inlets Inlet connections for a fire main should be installed in an external wall or in a boundary wall of a building as close as possible to the position of the main which they serve, ideally on the exterior face of the fire-fighting shaft and adjacent to the access point.
  • For typical building applications, the run of horizontal connecting pipe is a maximum of 18 m in length.
  • Where the fire-fighting shaft or fire-fighting stair is not adjacent to a perimeter wall, an assessment should be made as to whether more than one inlet needs to be provided.
  • If two or more inlets are provided, they should be sufficiently remote from one another to provide viable alternative locations from which to charge the fire main.
  • If there needs to be more than one fire main inlet for an installation it should be agreed with relevant approving authorities and the local fire and service.
  • In selecting positions for inlet connections, account should be taken of the positions of fire hydrants, the parking locations for fire appliances, and the effect that falling debris and other possible occurrences during a fire might have on the continuing viability of the location (see BS9991 and BS9999).
  • Inlets should be flanged rather than directly threaded to allow for ease of maintenance.
  • The number and disposition of rising/falling mains should be in accordance with BS9991 or BS9999 as appropriate. For large buildings or sites comprising multiple buildings, multiple horizontal or vertical fire main pipework runs should not be served from the same inlet connection.
  • Fire mains should be electrically earthed in accordance with BS7671 and BS7430. Those joints which do not provide electrical continuity should be bonded.


Dry Risers Direct are excited to be involved in the development of flats on a former car park in the popular seaside town of Hunstanton, Norfolk. 

The £6.8m development in Southend Road consists of 32 new one, two and three bed apartments based around a courtyard. The design is based on the Hunstanton’s Victorian heritage. Priority will be given to permanent homes for local people.

The project is a partnership between the Borough Council of King’s Lynn...


Residential Development in HunstantonHunstanton Dry Risers in Residential development

News Articles

14 - 03 - 2024

Dry Riser Testing & Servicing Frequency

Servicing Requirements for Dry Risers Dry risers sit unused for years but it is vital that they are fully working and accessible when required. For...


27 - 02 - 2024

Denis Baillie New Service Coordinator

Welcome to Our Team, Denis! After a very successful 2023 Dry Risers Direct are proud to be expanding our team. We’re delighted to introduce the...


14 - 01 - 2024

Installation Regulations for Dry Risers

Regulations for the installation of dry risers in the UK Dry riser design and installation is governed by British Standard BS9990 2015. It is a...


23 - 11 - 2023

Dry Riser Service Engineer Job Vacancies : London

After a our record breaking success over the last 12 months Dry Risers Direct are expanding our workforce. We have been looking for at least...



Adrian, Apologies for the delay in getting back to you, I was out of the office on Friday.  Steve and Mathew did an excellent job both with the test and repair.  Thank you   Andy University of Huddersfield

We have two Dry Risers in Anglesey, both of which had been neglected for a long period of time. Initially I was informed that both Dry Risers were in need of fairly major repair work. I contacted Dry Risers Direct and they responded in a professional, helpful manner, without fuss or delay. They completed an initial survey of both Dry Risers and proposed alternate options which would avoid unnecessary expense, extensive repair work, extensive building work and would be completed in time to satisfy the Fire Service. To my and the Directors delight they fulfilled all their promises and today we have two fully functional, air tight and Certified Dry Risers.

John Batson, Property ManagerGlyn Garth Court

To whom it may concern, I have been asked to give a reference for Dry Risers Direct. I would have no hesitation in using again or recommending this company. The were punctual, clean, tidy and pragmatic. There were several challenging issues within our existing building that some other companies were daunted by. Adrian and his team displayed a wealth of experience to accomplish our project and meet stringent building control regulations. I look forward to working with Dry Risers Direct on our next project.

Colin Gorman, Managing DirectorCullion Developments


We work with

Dry Risers Direct Limited,

Units 2 & 3 Millbank House,
Riverside Business Park,

Enquire Here

Book Your Service

This website uses Cookies to improve your browsing experience. View Cookies Policy

I'm fine with this