The Singulair Green advanced treatment unit from Norweco is designed to quietly, efficiently and automatically treat all domestic wastewater in 24 hours. The durable, watertight HDPE tank can be used for either new or replacement applications. It is easily installed and offers single-tank convenience. The all-in-one system contains pretreatment, aeration, clarification, filtration, flow equalization, and optional disinfection and dechlorination. Incorporating support ribs and strong arch shape, the tank is designed for a long life span. Designed for domestic wastewater flows up to 600 gpd, with treatment performance meeting or exceeding the strictest state and county requirements, it is certified by NSF to Standards 40 and 245 for nitrogen reduction. 800-667-9326; www.norweco.com.