Backflow Prevention Devices
The simplest and most effective backflow preventer would be an air gap between any device that opens to a plumbing system, However with a submerged mains inflow a backflow preventer is required to protect the potable water from contamination hazards.
There are many different causes for backflow some of the main reasons are:
- A sudden drop in water pressure
- High demand for water in your street
- Frozen pipework
- Burst water mains
A backflow preventer is essential in the protection against contamination, these can be found in many forms and should be fitted in accordance with the current guidelines and regulations as these are required by law in certain applications.
There are over 10,000 recorded cases of backflow contamination each year (some being fatal) which indicates the importance of a backflow prevention device.
Most backflow preventers will incorporate test points and isolation valves which allow for annual inspection and maintenance.