I've never heard of it for plumbing, but kinda in a similar vein most electrical codes require a certain setback for all cabling running through studs and prote

I've never heard of it for plumbing, but kinda in a similar vein most electrical codes require a certain setback for all cabling running through studs and protection where it can't be maintained. If the cable is passing through a stud less than 1.25" from either face of the stud (giving you ~1.75" once drywall is installed), then a metal plate has to be installed to stop someone trying to hang a picture or shelf or something innocuous up from driving a screw into the cable.