The ABC’s of Plumbing – RPZ Backflow Testing

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 Southwest Plumbing & Air Conditioning, we can help.