The Spiraflo peripheral-feed, center-takeoff clarifier from Lakeside Equipment Corporation functions with influ­ent entering the periphery of the tank with the flow moving to the center for removal by a centrally located effluent trough. This flow pattern is the direct opposite of the conventional center-feed clarifier, where the influent enters at the center of the tank and moves radially out­ward from the center-feed well to the effluent weir located around the periphery of the tank. Comparative tests have been conducted between Spiraflo clarifiers and quiescent settling that shows the unit approaches or equals that possible by quiescent settling. 630/837-5640; www.lakeside-equipment.com