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Testing Dry Risers
 

We use a fully equipped fire tender to test Dry Riser systems.

Get a FREE quotation when you call 01225 792111. Ask for our Dry Riser Division.

We are fully covered with a comprehensive insurance policy and we are Warrington approved certificated FIRAS standards which is recognised by UKAS and members of British Automatic Fire Sprinkler Association, the principal UK trade association for the fire sprinkler industry.
 
 
 
Dry Risers Explained
Dry and wet rising mains are intended for use by the fire brigade or other trained personnel. Dry risers are vertical mains fitted into staircase enclosures or other suitable positions, constructed of 4'' galvanized steel throughout with outlet valves on each floor and an inlets fitted at ground level to enable the fire brigade to connect to the water supply. Wet risers are pipes kept permanently charged with water either from a storage tank (via a booster pump) or direct from the town's main water supply. Fire Sprinkler Systems UK install dry and wet rising mains to the exact requirements of the surveyors building control and fire brigades.
Installing Dry Risers
One of our pip fitters roll-grooving 6inch pipes at Brunel Shopping Centre Sprinkler System, using a 918 machine.
Here is a section of 4''inch pipe work fitted throughout the main corridor above ground level.
   
Expansion joint to allow movement within the dry riser system.
   
    Installing sub level Dry Riser.
   
Air valve at the last outlet at the top of the building.
   
The New Swindon Hospital: Testing the Dry riser systems using our Fire Tender.
 
Method Statement for Dry Riser Testing
 
  1. Inspect all pipe work, joints and valves to ensure they are in good condition and have not been damaged.
  2. Open and close each landing valve, lubricating if necessary, and inspect internally for blockages. Fit new instantaneous washers where any appear to be perished.
  3. Locate air release valve and check on its condition. Replace if ball appears to be perished.
  4. Inspect inlet breeching and drain valve, lubricating if necessary.
  5. Insert pressure gauge into the instantaneous coupling on the top landing valve.
  6. Connect drain hose to the drain valve.
  7. Connect water feed to the inlet breeching non-return valve. 8. Fill the riser with water, whilst ensuring all air is released from the air valve.
  8. 9. When riser is full check each landing valve and all pipe work for any leaks.
  9. If no leaks detected, then water pressure should be taken to 2 bar reading at the top landing valve. Water feed should then be disconnected. Again check all valves and pipe work for leaks. Also check that the pressure reading at the top valve has not dropped as this would indicate a leak.
  10. If no leaks detected, water feed should be reconnected and pressure should be increased to
  11. bar at the inlet breeching. At this point the water feed should again be disconnected. A note should be made of the pressure reading at the top landing valve.
  12. If possible a flow test should be carried out from the top outlet valve. This is not always possible, depending on the type of building. See appendix A.
  13. The riser should now be left under pressure for a period of 15 minutes.
  14. If the pressure reading at the top landing valve has not reduced by more that 2 bar, the riser may be certified as passing the test.
  15. The riser should now be drained by opening the drain valve at the lowest point of the riser.
  16. Once the riser is totally drained the valve should be shut tightly.
  17. If landing valves are not in locked cabinets then they must be secured in the closed position using a leather strap and padlock.
  18. A maintenance label must be fitted in the inlet cabinet stating the month and year of the test, the result of the test and the engineers who carried out the test.
Appendix (A).
  1. Flow testing of a dry riser system.
  2. At the top of the building a connection to the last outlet valve is made via a two-and-a-half inch lay flat hose.
  3. The hose is run outside to the roof.
  4. Connect the flow meter to the lay flat hose end-of-line coupling in the open position.
  5. The fire tender increases the water flow to the required working speed of 2400 rpm. And the flow is recorded at the top of the building we are looking for 500lpm at this point.
  6. Completely expel the air from the system.
  7. Close the Flow testing equipment.
  8. Take a reading of the pressure.
  9. Open the flow testing equipment and monitor the flow.
  10. This is then recorded and logged on the certificate.
 
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