Product Information Product Name : Aqua Pura B-550Manufacturer: Enviro-Flo, Inc.Original Certification Date: 01/01/2016Certification Date: 01/01/2016Certification End Date: 01/01/2023Capacity: 550Material: ConcreteType: Aerobic Treatment SystemClass: Class 1 Certifications Certification: Certifications: NSF/ANSI Standard 40 Standard year: 2019 Version Year of Original Standard: 2013SPE#: 265 Approved Approved Aerators: Manufacturer: HiblowModel: HP60Hi Blow model: HP-60 Approved Diffusers: Manufacturer: Sweetwater Fine Pore Approved Alarms: Manufacturer: Included on Aerator