In order to use an in-line eductor effectively, the foam must be:

Using an in-line eductor effectively requires that the foam be of correct quality and generated at proper pressure because these factors ensure that the foam performs optimally when mixed with water. The quality of the foam determines its ability to suppress fire effectively; if the foam is not suitable for the type of fire being addressed, it may not provide the necessary coverage or suppression capability.

Furthermore, the proper pressure is critical because the eductor relies on the venturi effect to draw the foam concentrate into the water stream. If the water pressure is too low, there may not be enough suction to properly mix the foam with the water, resulting in an inadequate foam solution that can hinder firefighting efforts. Therefore, both the quality of the foam and the pressure at which it is generated are essential for effective use of an in-line eductor in fire suppression operations.