In concrete purposes, PEX pipe ought to be tied to rebar, except with a slightly looser in shape than what you would use with rebar by yourself. Here is an image of the vertical bit of rebar, zip-tied into a horizontal piece, resting on a vertical chair: 1st, evaluate http://concreteaccessories48260.blogsmine.com/1160175/how-to-use-rebar-ties-no-further-a-mystery