Backflow Preventers

By | March 8, 2012

Backflow preventers are used to prevent water being contaminated specially on public water system and or costumer’s potable water system, it protect against back siphon age of contaminated water into the potable water supply, one of the reasons of water being contaminated is the entering of the polluted water from other sources and mix it with the clean water in the pipes. Different kind of preventers have been made to prevent water from being contaminated and some of these are check valves and air gap, preventers ensure the water to flow in only one direction and preventing it to mix with other water which came from other source. In some cases as well, water got contaminated because of several factors, water became toxic sometimes because of fertilizers, pesticides, animal waste and more toxic chemicals which sometimes mix in the water in an accidental manner.

Some of backflow prevention device


* Air gap

* Atmospheric vacuum breaker (AVB)

* Check valve (usually not a legally-approved method of backflow prevention)

* Chemigation valve (primarily used in agriculture)

* Double check valve, or double check valve assembly (DCVA)

* Pressure vacuum breaker assembly (PVB)

* Reduced Pressure Principle Valve (RPPV or RP Device)

* Reduced pressure zone device (RPZ)

* Spill Resistant Pressure vacuum breaker assembly (SPVB)