© 2014 by GHC/ADF. 

A dry riser is a system of valves and pipe work that enables the Fire Service to pump water up to the upper floors of a building.

 

It is needed:

  • In a building with floors more than eighteen metres above the ground

  • In lower level buildings where there are large distances from entrances.

 

The need for a dry riser is established during a fire risk assessment; if it is necessary, the Fire Service must be called in to ascertain the exact requirements for the fitting.

 

All dry risers must comply with BS9990/2006; if they do not, your insurance may be invalidated.

Dry risers need two tests:

  • 6 Month Visual Inspection
    • This checks:
      • All valves open and close
      • All outlet washers
      • The blank caps and chains for damage or if they are missing
      • All hand-wheels are undamaged and in place
      • Landing outlets are free moving and unbroken
      • For corrosion of the inlet cabinet and door
      • The inlet breeching valve springs and rubbers are free to move and in good condition
      • The cabinet glass
      • All required signage is present, correct and clear to see
    • Should any damages be reported or missing equipment noticed, our team will fix and replace them.
  • Annual Pressure Testing
    • This requires:
      • Connecting the inlet to a pump and water supply
      • Completely charging the system with water to a pressure of 10 bar, measured at the inlet for at least 15 minutes
    • During this process, checks are made for:
      • Any leakage of water at any joints or landing valves
    • In the event of a failure, a retest is required.

 

Dry risers must be installed to have fire engine access within 18 metres of the inlet box; they must be housed inside a fire resistant shaft, which is usually found underneath the staircase of a fire exit, in commercial properties.

Sprinklers are very straightforward in design and operation, even in the most sophisticated of systems. Statistics show that 99% of fires can be controlled by automatic sprinkler systems and 60% of these fires will only need four sprinkler heads to do so. In case of fire, losses from fire in a sprinkler-protected builidng are estimated to be 1:10 to an unprotected building.

 

They need:

  • A water supply, usually connected to the town water mains in the street
    • Or
  • A water tank and pump or similar self-contained water source

 

These all are connected to a series of pipes, feeding water to the sprinkler heads, which are strategically placed throughout the protected area.

 

Our professional team can carry out inspections on your sprinklers to ensure protection in case of fire. Our inspection involves:

  • Operating the control valves
  • Testing tamper switches
  • Ensuring local and electronic alarms function properly
  • Testing valves to ensure the operation of flow switches
  • Performing a flow test on the system or pumps
  • Inspecting the sprinkler heads for:
    • Rating
    • Damage
    • Obstructions
    • Corrosion
  • Testing water flow and the operation of fire and jockey pumps
  • Trip testing dry-pipe, pre-action and deluge valves as needed
  • Inspecting gravity tanks, reservoirs and pressure tanks
  • Replacing rubber seals on valve sets

We will produce you with a detailed report on what we have inspected and what maintenance we have taken out, if needed.

Dry Risers & Sprinklers