Samples are usually taken only at the outflow. In this case, the sampling point is from the outlet pipe to the emergency overflow, the last accessible point before the discharge from the plant. In the case of additional installed cleaning stages, it logically is always the last accessible point before leaving the plant. If it’s necessary to also take inflow samples it’s most appropriate to place a container under the inflow pipe so that all incoming wastewater passes through this container and then take a ‘mixed’ sample from this container. As an optional accessory, the plant can also be supplied with an additional sampling container installed inside the plant, where the necessary amount of water for sample collection is always available.