How can backflow be prevented?

Some of the most harmful threats resulting in a backflow come from swimming pools, lawn irrigation systems and garden hoses. Through these devices a vacuum can be created and water can accidentally flow backwards or backflow carrying any chemical, cleaner or other contaminant directly back into our drinking water supply. Even a simple garden hose submerged into a pool, a bucket of water or other container filled with liquid can create a vacuum. However, there are a few simple preventative steps to follow around your home to avoid backflows.

Backflow Prevention Steps

  • Never submerge the end of a garden hose in a bucket, pool, tub, sink, fertilizer or herbicide sprayer, ponds, etc. Always maintain an air gap between the liquid and the end of the hose.
  • Install vacuum bibs on outside faucets that will break a vacuum at the faucet. If a vacuum is created on the public water main line, it will be broken at your outlet and no water will be allowed to flow backwards. These devices are available in most hardware stores.
  • Install an approved backflow prevention device (BPD) by a certified backflow technician on all lawn irrigation systems. It is required by City code.

Show All Answers

1. What is backflow?
2. What is thermal expansion?
3. What can be done about thermal expansion?
4. What is cross-connection?
5. How can backflow be prevented?
6. What is a backflow prevention device (backflow preventer)?