The Singulair Green advanced wastewater treatment system from Norweco quietly, efficiently and automatically treats all domestic wastewater in 24 hours, according to the manufacturer. The durable, watertight polyethylene tank may be used in new or replacement applications. It is easily installed and offers single-tank convenience. The system performs pretreatment, aeration, clarification, filtration, flow equalization and optional disinfection and dechlorination. Incorporating support ribs and an inherently strong arch shape, the tank provides treatment of wastewater flows up to 600 gpd, meeting or exceeding the strictest state and county requirements. It is certified by NSF International. 800/667-9326; www.norweco.com.