Tigre USA 1-1/2" Poly Insert Adapter. For use with COLD water only. Do not use with compressed air or gases. Do not use in a dwelling. It is ASTM D-2609 Listed. It is NSF 14 and 16 Listed for potable water services. Poly Insert Adapters Are Used To Adapt 1/2 FPT To Polyethylene Pipe In A Straight Line In Cold Water Applications Only. Can Be Used Underground Or Above Ground For Pool And Spa Applications, Water Service And Agriculture Uses. NSF Approved.