Product Information Product Name : 550-PC-400 PTManufacturer: Enviro-Flo, Inc.Original Certification Date: 03/23/2016Certification Date: 03/23/2016Certification End Date: 03/23/2023Capacity: 550Material: ConcreteType: Aerobic Treatment SystemClass: Class 1 Certifications Certification: Certifications: NSF/ANSI Standard 40 Standard year: 2023 Version Year of Original Standard: 2009SPE#: n/a Approved Approved Aerators: Manufacturer: OtherModel: Hakko HK60 Approved Alarms: Manufacturer: Enviro-Flo