Backflow is hazardous condition that can exist when there is a drop in pressure in a plumbing system that causes contaminated, non-potable water to be syphoned back into the fresh water supply.
One example of backflow contamination is a hose left in a pool or submerged in a garden. If the pressure changes, the dirty water can be drawn back up into the home's plumbing system. Without an anti-siphon hose bib, dirty water could enter the fresh water supply.
To prevent backflow in a home's plumbing system it's important that outdoor faucets have working hose bibs to prevent contamination. In addition the plumbing system should be checked to ensure that sump pumps, toilets, faucets and other systems are properly installed to prevent crossflow contamination.
If you're concerned about backflow in your home's plumbing system, call ABC Southwest Plumbing and Air Conditioning. We can help answer all your questions.
RPZ , or Reduced Pressure Zone, is a plumbing safety device that is designed to protect your drinking water from contamination. RPZ valves are needed when a house has an irrigation system, fire suppression system, or other systems where there is an likelihood of contaminants entering the fresh water supply. In the event of a water leak in the house, city water main break, hydrant flushing, or hydrant use due to a fire, the water pressure in the house can drop lower than the water pressure in the supply. This can cause backflow into the drinking water supply.
When a drop in water pressure occurs, an RPZ valve will open up, diverting the waste water out instead of allowing to return to the fresh water supply. In most cases a RPZ or backflow prevention device is required by law to prevent contamination.
Have questions about backflow or RPZ backflow testing? Call ABC Plumbing and Air Conditioning, we can help.