What is a dry riser? A dry riser is a system of pipework and valves usually installed on buildings over 18 metres high, but below 50 metres in height. The main purpose of a Dry Riser system is to enable the Fire Brigade too quickly and effectively stop the spread of a fire. Potentially saving lives and property.
Dry Risers consist of vertical and horizontal pipe with an inlet breaching valve at ground level (usually on the external of a building). With Landing valves on each floor within the fire lobby area or similar fire enclosure. The pipes in dry risers are empty and are only filled when fire fighters arrive or if planned maintenance is being carried out.
DO YOU NEED A DRY RISER OR WET RISER
As per British standards, Dry risers, as mentioned above are generally required in buildings over 18 metres in height but below 50 metres. Wet risers would be required in any buildings above 50 metres in height.
The difference between wet and Dry risers is the fact that a wet riser is constantly full of water hence why they are called Wet Risers. They are generally mains water fed with a pump room located usually within the basement area of a building. Which gives the pressure required on the higher floors.Wet risers are designed to give around 1500 litres of water per minute. Which gives instant uninterrupted access to a water supply for the emergency services.
REGULATIONS
Dry Risers by law need to be maintained properly to ensure they work effectively in the event of a fire in your building. To keep in line with current British standards (BS9990-2015, BS9991, BS9999 and approved document B), Dry risers need to be visually inspected every 6 month and hydraulic pressure tested every 12 month or after use by the fire brigade. It is the responsibility of the buildings owner or facility management company to ensure that all legal requirements are met.
Feel free to get in touch with us, we can provide you with professional, hassle free, planned and preventive maintenance packages. info@firetechdryrisers.co.uk
