Product Information Product Name : E50NManufacturer: Delta Treatment Systems, LLCOriginal Certification Date: 10/01/2017Certification Date: 10/01/2017Certification End Date: 10/01/2024Capacity: 500Material: FiberglassType: Aerobic Treatment SystemClass: Class 1 Certifications Certification: Certifications: NSF/ANSI Standard 40 Standard year: 2019 Version Year of Original Standard: 2009SPE#: 154 Approved Approved Aerators: Manufacturer: Delta-06Model: Delta E50/FPZ SCL 06 Approved Diffusers: Model: Plastic Approved Alarms: Manufacturer: Delta