Which type of plumbing system utilizes a Venturi tee?

The one pipe or monoflow system is designed to move fluids, often in heating or cooling applications, using a single pipe for both supply and return. This system utilizes the Venturi effect, which is the principle that a fluid's velocity increases as it moves through a constricted section of a pipe, causing a decrease in pressure.

In the context of plumbing, a Venturi tee is a fitting that allows a liquid to be drawn from a main line into a branch, which is useful in creating circulation without the need for a large number of pumps or additional pipe work. The system benefits from reduced complexity and material costs, as the single pipe can handle multiple functions efficiently.

The other options do not align with the characteristics of a Venturi tee. A two-pipe system typically uses separate pipes for supply and return, which would not utilize a single point of fluid introduction as seen in the monoflow approach. The gravity sewer system relies on gravitational flow rather than pressure differences facilitated by a Venturi effect. Lastly, a drainage and vent system is primarily focused on waste removal and air venting rather than fluid transfer through variations of pressure and flow rates as achieved with a Venturi tee in a monoflow system.