Abstract: Disclosed is a dissolved air flotation (“DAF”) device. The DAF device creates an elongated separation zone to permit agglomerated impurities to be more effectively removed from the influent. A header is included at the lower extent of the separation zone to collect the clarified effluent. In one possible embodiment, a collection channel with a series of intake apertures is connected to the header. In another embodiment, intake apertures are located along the header. In either embodiment, the header reduces the rate at which the effluent is collected and, thereby, reduces the inadvertent collection of agglomerated impurities.