Product Information Product Name : Aqua Pura B-500Manufacturer: Enviro-Flo, Inc.Original Certification Date: 01/01/2016Certification Date: 01/01/2023Certification End Date: 01/01/2030Capacity: 500Material: ConcreteType: Aerobic Treatment SystemClass: Class 1 Certifications Certification: Certifications: NSF/ANSI Standard 40 Standard year: 2023 Version Year of Original Standard: 2013SPE#: 265 Approved Approved Aerators: Manufacturer: HiblowModel: HP40Hi Blow model: HP-40 Approved Diffusers: Model: Model AR230 Approved Alarms: Manufacturer: Included on Aerator