Can garden hoses create backflow risks?

Garden hoses can indeed create backflow risks, particularly when they are submerged in contaminated water. This scenario is a prime example of a cross-connection, which occurs when potable water is connected to water from a non-potable source, such as a pond, pool, or even a flooded area. When a garden hose is submerged in this type of water, there is a potential for backpressure or backsiphonage to occur, which can pull that contaminated water back into the potable water supply.

In order to mitigate this risk, it is essential to employ backflow prevention devices or maintain appropriate air gaps when using garden hoses near contaminated sources. Understanding this risk is crucial for ensuring the safety and integrity of drinking water supplies.