A Complete Guide for Dry Riser Installation, Servicing and Testing

While installing fire safety equipment, it is important to ensure that it has adequate supply of water in the absence of which it may not prove to be effective in case of a fire emergency. A dry riser can ensure optimum water supply to the entire building where it is installed.

Dry riser installation

A dry riser consists of a vertical pipe, which may branch into a system of pipes. These pipes ensure water distribution to various building levels. A dry riser helps in fire suppression and is generally fitted in an accessible area of the building like the staircase. Dry risers are installed in enclosures which are fire proof and at a maximum of 18m distance between the fire engine and inlet box.

Dry risers are installed according to the building regulations which mandate their installation with buildings above 18m in height. Opting for a dry riser installer servicing ensures adequate water supply to all levels of the building in case of a fire. In order to ensure this, it is important that the external inlet parts of a dry riser remain accessible during a fire emergency. The pipes in the dry riser consist of compressed air that is released to allow water flow in the situation of a fire emergency.

Dry riser testing

The safety standards for dry risers include the following aspects:

• Dry risers are serviced at six monthly intervals.
• An annual hydraulic pressure testing is done for a minimum time of 15 minutes.
• The building’s managing agent, landlord or owner is responsible for ensuring dry riser testing.
• Failure to inspect and test dry risers can invalidate the building insurance.

Dry riser testing is of the following main types:

Annual wet testing

The wet testing undertaken annually involves the following steps:

• The system is pressurized with water up to 10 bar for a minimum period of 15 minutes, with the help of a special test rig.
• If the riser is unable to hold the pressure, the joints, outlets and inlets are inspected for leaks and faults.
• Faulty items are replaced and another pressure test is undertaken.
• On completion of the testing procedure, the dry riser is drained.
• After being satisfied with the test results, a certification is issued.
  

Visual inspection

Visual inspections of the dry risers are undertaken every six months. Any visible damaged or missing items are noted and replaced. This type of inspection covers the aspects like signage, inlet valve rubbers and springs, glass and doors, inlet cabinets, landing outlets, nuts and wheels, chains and blank caps, outlet washers, locks and straps and valves. This type of comprehensive inspection ensures early detection of faults. In case the pipe work in the dry riser requires alterations, it is advisable to do a complete flow test.
It is important to ensure that inspection and testing is carried out by an expert. This can help to ensure safety in case of a fire emergency and lower the risk of damage to property and loss of life.