Product Information Product Name : D-500-800PTManufacturer: Aeris AerobicsOriginal Certification Date: 06/18/2014Certification Date: 06/18/2014Certification End Date: 06/18/2028Capacity: 500Material: ConcreteType: Aerobic Treatment SystemClass: Class 1 Certifications Certification: Certifications: NSF/ANSI Standard 40 Standard year: 2019 Version Year of Original Standard: 2012SPE#: 220 Approved Approved Aerators: Manufacturer: HiblowHi Blow model: HP-40 Manufacturer: SecohSecoh model: EL-40 Approved Diffusers: Manufacturer: HiblowModel: Hiblow Polypropylene Model TP-250