Patent ID: 7857545
Filing Date: 2010-12-28
Classification: E03F

Abstract:
1. An apparatus for a variable volume drain field for onsite renovation of wastewater, said apparatus comprising: a storage member configured to contain a volume of wastewater, said storage member configured to be positioned adjacent a wastewater delivery pipe in a drain field trench; a weir inlet positioned adjacent an upper end of said storage member, said storage member receiving said volume of wastewater through said weir inlet; and a one-way flow control device in fluid communication with a lower end of said storage member, said one-way flow control device preventing fluid flow into said storage member, said one-way flow control device discharging said volume of wastewater only when said storage member has a positive differential pressure; whereby said storage member receives said wastewater only after said drain field trench substantially fills with said wastewater, and said wastewater drains from said storage member only when said wastewater has a level in said drain field trench lower than a level of wastewater in said storage member.