They are vertical mains fitted into staircase enclosures or other suitable positions, with outlet valves on each floor and inlets fitted at ground level to enable the fire brigade to connect to the water supply. The current standard for the installation of Dry Riser Systems is BS9990 2015.
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• National coverage by specialist (not commission based) engineers with specially adapted testing vehicles
• Each Dry Riser service includes our 16 point service with full detailed electronic report provided following every visit
• Wet Riser and Fire Hydrant test and commissioning carried out in accordance with BS9990 2015 using the latest digital flow and test equipment
• Competitive standard, all inclusive or bespoke service agreements offered along with other Fire Protection equipment maintenance available subject to enquiry
• £0 No access charge on failed visit (first visit only)
The main difference between dry riser and wet riser systems, is that one contains water at all times, whereas the other is an empty system that can be flooded with water when needed to get it to a specific place.
Wet Riser Systems
Wet riser systems are more common of the two and can be found in many buildings world wide, they are a system of pipes that are kept full of water at all times that may be quickly dispensed in the event of an emergency. The water suppoy for a wet riser is usually pumped from a central storage tank, to specific valves on each floor. Although they already contain water, it is also possible for fire fighters to use a supplement the water supply in the riser with their own water, if the supply is running low. Wet Risers are used when water immediately available where it is needed, they are needed in buildings over a certain height as the pumping pressure may be more than can be provided by the fire service.
Dry Riser Systems
Dry Risers can be found in low-level building and those up to 18 metres above ground level, whereas wet risers are found in higher buildings. Both systems require regular maintenance to ensure they remain in full working condition. Dry Riser systems are more effcient than the use of manual hoses as they allow water to be pumped to multiple places from more than one source. This elimates the time and effort it would take to run hoses to different parts of a building. They still enable a quick response in the event of an emergency and can easily be installed. Testing Dry Risers with water on a regular basis determinds whether there are any areas prone to leakage, or any drops in pressure during the test.