https://www.charlottepipe.com/Documents/PL_Tech_Man/Charlotte_Plastics_Tech_Manual.pdfPlastic moves considerably in heat cold cycles. Abrasion/cutting over long term I suppose why it is in the code.
And, plastic is required to be rigidly supported and hanging straps do not address that.
To hold plastic pipe in place up against wood, you can use 10 mil. tape to isolate the metal from contact.
They make rigid plastic pipe hangers.
Enter your email address to join: