Dry risers are vertical pipes installed in buildings exceeding 18 meters in height, providing firefighters with rapid water supply access to upper floors during emergencies. Unlike wet systems, they remain empty until fire service connection, preventing freeze damage and reducing structural load. But dormant systems can develop faults — corrosion, blockages, valve failures, and pressure losses — making them useless when lives depend on them.
BS 9990:2015 mandates annual pressure testing and 6-monthly inspections. The Regulatory Reform (Fire Safety) Order 2005 places legal obligation on responsible persons to maintain functional dry risers. Non-compliance creates prosecution risk and catastrophic firefighting capability failures.
Applicable Standards
- •BS 9990:2015: Non-automatic fire-fighting systems in buildings — Code of practice for dry risers
- •BS 9991:2015: Fire safety in residential buildings — Guidance on dry riser requirements
- •Regulatory Reform (Fire Safety) Order 2005: Legal requirement for functional firefighting equipment
- •Approved Document B: Building Regulations guidance on fire safety provisions
Responsible Person Obligations
Under fire safety law, responsible persons (building owners, duty holders, facilities managers) must:
- •Commission annual pressure testing by competent engineers
- •Conduct 6-monthly visual inspections of outlets, valves, and signage
- •Maintain accessible test certificates and inspection records
- •Remediate identified defects immediately
- •Ensure clear access to inlet and outlet points
- •Coordinate with fire service for system familiarization
Inspection & Testing Frequencies
| Test Type | Frequency | Standard | Documentation |
|---|---|---|---|
| Visual Inspection | Every 6 months | BS 9990 | Inspection log |
| Pressure Test | Annually | BS 9990 (1034 kPa for 5 min) | Test certificate |
| After Repairs | As needed | BS 9990 | Remediation cert |
| Commissioning | At installation | BS 9990 | Commissioning cert |
What We Test
Pressure Integrity
- •System pressurized to 1034 kPa (10.34 bar)
- •5-minute hold period monitoring pressure drop
- •Leak detection at joints and outlets
- •Pipe integrity verification
Component Inspection
- •Inlet box condition and accessibility
- •Outlet valve operation and sealing
- •Landing valve functionality
- •Signage visibility and accuracy
Non-Compliance Consequences
Firefighting Failure
Non-functional dry risers prevent fire service water supply to upper floors during fires, directly causing deaths and catastrophic property loss. This represents gross negligence.
Legal Penalties
- •Criminal prosecution: Fire service enforcement under Fire Safety Order
- •Unlimited fines: No financial cap for fire safety breaches
- •Imprisonment: Up to 2 years for responsible persons
- •Prohibition notices: Building closure until compliance demonstrated
- •Corporate Manslaughter: If death results from fire safety failures
- •Insurance invalidation: Claims rejected without test certificates
Our Dry Riser Service
We deliver BS 9990 compliant dry riser testing through qualified engineers with specialist pressure testing equipment:
- •Annual pressure testing to 1034 kPa with certified gauges
- •6-monthly visual inspections of all components
- •Defect identification and remediation coordination
- •BS 9990 certification with complete test documentation
- •Digital certificate management and renewal alerts
- •Multi-site governance for property portfolios
Related Services
Frequently Asked Questions
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