Wet Riser Maintenance Checklist
Keep your permanently charged wet riser ready — pump set tests, pressure and landing valve checks, water storage, and the annual flow test to BS 9990.
What is a wet riser maintenance checklist?
A wet riser maintenance checklist is a structured list of the 10 preventive maintenance tasks — covering visual, functional and record-keeping checks — that keep a wet riser running safely and reliably. It groups routine checks by frequency, from daily inspections to annual servicing, so FM teams and building engineers can plan and evidence preventive maintenance.
Core wet riser checks
- Confirm water storage tank level, supply, and (where fitted) heating
- Test the duty and standby wet riser pumps and confirm correct changeover
- Record pump tests, pressures, flow results, and defects in the log
What is a wet riser?
A wet riser is a firefighting main that is permanently charged with water by a dedicated pump set, supplying landing valves on each floor. Wet risers are required in tall buildings — generally above about 50 m — where pumping from a fire appliance into a dry riser is not practical. They are maintained to BS 9990 and require regular pump testing, pressure verification, landing valve checks, and an annual flow test. Because the system is always pressurised, the pump set, water storage, and standby supplies are central to its reliability.
Typical Wet Riser maintenance checklist
A practical starting point for planned preventive maintenance. Always refer to the manufacturer's O&M manual and site-specific requirements.
Visual Checks
- Confirm water storage tank level, supply, and (where fitted) heating
- Inspect pump set, pipework, and valves for leaks and corrosion
- Check pressure gauges, relief valves, and air vessels are within range
- Confirm cabinets and signage are correct, accessible, and unobstructed
Functional Checks
- Test the duty and standby wet riser pumps and confirm correct changeover
- Verify system pressure is maintained at landing valves on test
- Check landing valves operate and have caps, straps, and washers fitted
- Verify standby power/secondary supply to the pump set is available
- Carry out the annual flow test at the topmost and most remote outlets
Record Keeping
- Record pump tests, pressures, flow results, and defects in the log
Typical maintenance frequency
Suggested intervals for wet riser maintenance. Actual frequencies should follow manufacturer guidance and site-specific risk assessments.
Weekly
- •Pump start test and changeover
- •Confirm system pressure
- •Check tank level
Every 6 Months
- •Landing valve and cabinet inspection
- •Pressure and relief valve checks
- •Standby supply verification
Annually
- •Full flow test to BS 9990
- •Pump performance test
- •Tank inspection
- •Issue test certificate
Common faults and issues
Issues to be aware of when maintaining wet riser equipment.
Safety and compliance notes
Key safety considerations for wet riser maintenance. This is general guidance only — always follow OEM instructions, statutory requirements, and your organisation's safe systems of work.
Managing Wet Riser documentation with PM Assist
PM Assist helps FM and building operations teams search their O&M manuals and building drawings in seconds. Upload your wet riser documentation and ask questions like “What pressure should the wet riser pumps maintain?” or “When was the last flow test?” — and get source-cited answers instantly.
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