The garden hose is the most common cross connection. Each of these common uses of a garden hose sets up a cross connection: forcing it into a clogged gutter, downspout, or sewer pipe to flush out the clog.

There are two types of cross-connections – direct and indirect cross-connections. There are two types of backflow caused by these cross-connections – backsiphonage and backpressure backflow – and there are two types of backflow conditions – pollution (low hazard) or contamination (high hazard).

Chapter 4, titled Elements of a Program, lays out the desired elements of a cross- connection control program: Authority, Backflow Preventers, Certified Tester and Specialists, Defensible and Detailed Records and Education and Training.

A cross connection can occur in many places. One example is where a laundry tub has a faucet below the top of the laundry tub. If the faucet enters the tub through the wall, it is possible that when the tub is filled, the faucet will be submerged.

A cross connection is defined as a physical connection between drinkable water and a liquid or gas that could make the water unsafe to drink. The common sprayer hose is the most common cross connection within a food establishment.

There are two types of cross-connections – direct and indirect cross-connections. There are two types of backflow caused by these cross-connections – backsiphonage and backpressure backflow – and there are two types of backflow conditions – pollution (low hazard) or contamination (high hazard).

Common examples of cross-connections include a garden hose submerged in a pesticide mixture, a piped connection providing potable feed water to an industrial process, such as a cooling tower, or a submerged outlet of an irrigation system. Connections to firefighting equipment are other very common cross-connections.