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Backflow Prevention Valves Inspection & Maintenance

Backflow Prevention Maintenace


Water based epidemics are without doubt life threatening. Historically many cases of water contamination have been traced to defective valves in consumer, business and industrial environments.

Backflow prevention devices protect the population by preventing the threat from pollutants entering the supply and contaminating our drinking water. Without backflow maintenance there is the potential for contaminants such as fertilizers, chemicals and even poisons to enter the supply chain.

Regular inspection and testing of backflow prevention devices, to confirm that no contaminants are entering our precious water supply, is recommended.

What is Backflow?

Backflow is any unwanted flow of used or  *non-potable water, or other substances, into the
*potable water distribution system.

* Non-potable (Undrinkable water)   *Potable (Drinkable water)

A backflow prevention device is used to protect water supplies from contamination or pollution.

In water supply systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower etc. When pressure fails or is reduced as may happen if a water main bursts, pipes freeze or there is unexpectedly high demand on the water system, the pressure in the pipe may be reduced and may allow contaminated water from the ground, from storage or from other sources to be drawn into the system.

Backflow is a reversal of the normal direction of water flow in your water supply plumbing system. It presents a hazard where your water supply is inadvertently interconnected with a source of pollution. Those pollutants could then enter the water supply.

Annual Testing

Each backflow prevention containment device must be tested on an annual basis. This is a condition of connection to the water supply. It means that the Backflow device is maintained and continues to operate effectively.

The annual test will ensure the drinking water supply is protected from backflow.

If a Backflow device is defective or faulty, it may:

  • not prevent a contaminated source entering the drinking water supply
  • cause water to be wasted through leaking devices
  • impact on the water pressure supplying your property