The self-contained AdvanTex AX20-RTUV treatment system from Orenco Systems is designed to treat typical septic tank effluent to better than secondary standards, with nitrogen reduction and ultraviolet disinfection. Its intended application is for homes with up to four bedrooms, and it is suited for small sites with poor soils or those requiring shallow bury. It helps protect surface waters and aquifers and can be an effective solution for areas that have strict discharge limits. It is installed following a septic tank equipped with Biotube effluent filters. The unit eliminates the need for separate recirculation, treatment, discharge and disinfection tanks and basins, and reduces the number of risers and lids needed in the treatment train. 800/348-9843; www.orenco.com.