Product Information Product Name : AL 500 SManufacturer: Acquired Wastewater Technologies, LLCOriginal Certification Date: 02/15/2015Certification Date: 02/15/2015Certification End Date: 02/15/2022Capacity: 500Material: ConcreteType: Aerobic Treatment SystemClass: Class 1 Certifications Certification: Certifications: NSF/ANSI Standard 40 Standard year: 2019 Version Year of Original Standard: 2012SPE#: 233 Approved Approved Aerators: Manufacturer: MedoModel: LA-80Medo model: LA-120 Manufacturer: SecohSecoh model: JDK-60 Approved Diffusers: Manufacturer: CustomModel: FAO-506 Stones 1/2" Manufacturer: Polypropylene Approved Alarms: