All of us need to be aware of backflow prevention. It is a good neighbor practice as well as a safety issue for all water users. Backflow is the problem of used or polluted water being back-siphoned into to the public water supply.
Businesses, industry and homeowners can part of the problem. Water providers are profoundly aware of the problems caused by water users unwittingly contaminating our water supply.
Contamination can be caused by something as simple as putting an unprotected hose in an above
swimming pool or water feature.
Backflow preventers can be very cheap; such as the hose connection on your home or extremely expensive depending on the hazard and volume of water needs. An air gap is the cheapest and most effective way of prevention. Check out your sinks, bathtubs, showers for a perfect example of air gap prevention.
If you have questions about water backflow safety, you can contact your water provider, public health department or a certified backflow specialist.
We can all help by testing our backflow assemblies annually to make sure the device is working properly. https://a1spr.com/repairs-maintenance/backflow/
Air gap. Does not need to be tested.
Atmospheric vacuum breaker (AVB) Does not need to be tested.
Double check valve assembly (DCVA)
Pressure vacuum breaker assembly (PVB)
Reduced pressure zone device (RPZ)
Spill resistant pressure vacuum breaker assembly (SPVB)
Dual check valve. Not approved for most uses.