Our services include the testing of dry risers. In buildings over 18 metres high, dry risers are a vital element in fire protection, delivering vast volumes of water direct to each floor enabling instant access for the fire brigade.
Dry Riser Systems are installed in buildings for fire fighting purposes by trained personnel and which are normally dry and are capable of being charged with water by pumping from Fire Service Appliances or if agreement in place with local authority to use the mains water system. They are installed complete with an inlet breeching connector at Ground Floor or at Fire Service Access Level and with Landing Valves at specified points on each floor. Dry Riser Systems are installed up to 50m above the Fire Service Access Level.
Wet Riser Systems are installed in a buildings for fire fighting purposes by trained personnel and which are permanently charged with water from a pumped source. They are installed complete with Landing Valves at specified points on each floor. Wet Riser Systems are installed up to and above 50m subject to the system being designed to provide adequate flow and pressure at the upper floors.
The person responsible for a building or site is legally required to maintain all fire fighting equipment, including dry risers. Current British Standards require a full annual pressure test and six monthly visual check for dry risers for buildings above 18 metres and below 60 metres (buildings over 60 metres/18 storeys require wet risers).
British Standards state that inlets, landing valves, drain valves and landing valve boxes should be inspected every six months and that wet tests be carried out annually when the riser can be checked for leaks. They also state that maintenance and repairs should be carried out by a competent person.
Dry risers can be prone to vandalism, because they are situated on each floor, the valves are sometimes in allocated cabinets or they can be left in the open. Therefore, it is important to have them regularly maintained and serviced.
Dry risers are checked and pressurised to a test pressure of 12 bar for a minimum of 15 minutes. All inlets and outlets are checked for leaks and any missing or faulty items replaced. Flow testing is also carried out. If any valves need to be replaced, a further pressure test will be carried out before certification is issued.
This test involves a visual inspection only as required by British Standards. Any missing or damaged items are replaced during the inspection.