Submitter's message Please note that a new version of this document has just been published. NSF employees will be able to view it in MasterControl (document #12486); others can use the link below. Thank you for your contributions to this document! -- Emily Richardson Document Name : NSF/ANSI 358-1-2022: Polyethylene Pipe and Fittings for Water-Based Ground-Source ?Geothermal? Heat Pump Systems Description The physical and performance requirements in this standard apply to plastic piping system components as well as nonplastic components of the ground loop heat exchanger including, but not limited to, pipes and fittings used in water-based ground-source heat pump systems. Download Latest Revision Submitter : Emily Richardson Group : Joint Committee on Plastics and RV Plumbing Components Folder : Standards Date submitted : 2023-04-13 14:11:35 Revision : 6