What Do Our Dry Riser Maintenance Services Consist Of?
The Annual Static Pressure Test
The static test normally entails connecting the inlet to a pump & water supply. The system is then completely charged with water to a pressure of 10 bar measured at the inlet for a period of at least 15 minutes.
During this period, an inspection of the system is made to ensure that there is no leakage of water at any of the joints or landing valves.
Once the pressure test has been completed, the system must be drained so that it is left ready for immediate use in an emergency situation.
Visual Inspection, Maintenance & Remedial Repairs
British Standard BS9990:2015 recommends that the system is visually inspected every 6 months and serviced annually to ensure that the equipment is in a satistactory condition and ready for immediate use in an emergency.
The six monthly visual inspection consists of:
- Checking all valves open and close, leave closed (checking strap and lock if required)
- Checking all outlet washers
- Checking for damaged or missing blank caps and chains
- Checking that all hand wheels and nuts are undamaged and in place
- Checking landing outlets are free moving and undamaged
- Checking the inlet cabinet and door for corrosion
- Checking that the inlet breaching valve springs, and that the rubbers are free moving and in good condition
- Checking the cabinet glass
- Checking all required signage is present and correct
Maintenance & Remedial Repairs (as required):
- Replacing outlet washers
- Repair or Replace Valves (replace strap and lock as necessary)
- Replace blank caps and chains
- Repair or replace hand wheels and nuts
- Repair or replace landing outlets
- Replace the inlet cabinet and door
- Repair or replace the inlet breaching valve springs (and replace rubbers as necessary)
- Replace cabinet glass
- Supply dry riser signage to all floors (as necessary)
In the event of system failure due to inability to hold pressure for the recommended 15 minutes at 10 bar (at the inlet), on completion of the remedial repairs a re-test will be required.
Should the system’s pipework be altered (e.g. building alterations, extensions etc) then a full recommissioning flow test will be required.
Detailed Asset Inventory for each system
Provide a full written report detailing current status of all equipment for each system.
In the event that we identify any equipment to be unsatisfactory, a written estimate for remedial repairs can also be provided on request.
Certificate of Conformity
All systems that are found to comply with the standards and are therefore in a satistactory condition and ready for immediate use in an emergency will be issued with a Certificate of Conformity.
Dry Risers Ltd ensure all works are completed in accordance with BS9990:2015 – the industry recognised British Standard.