FYI, all codes require plastic pipe to be rigidly supported. That means no janky metal tape like your photo shows. In fact, metal is not allowed to be in contact with plastic because it can abrade and even cut plastic over time, given expansion and contraction.
There are many types of rigid plastic pipe supports available and most all will have a UPC type listing on them.
You can also use 2x4s with a plastic strap to hang rigidly, or if you use metal plumber's tape, it should be wrapped with 10 mil tape for protection.
Thanks for the heads up.
Well, you can thank the
licensed professional plumbers; they are from the "largest plumbing firm doing solely new construction in the Carolinas". There's a lot of a**-backwards things done here in a number of ways; every day brings a new revelation. BTW that galvanized pipe hanger you note won't abrade anything, merely because it is so loose,
it isn't even supporting the pipe! And, since I'm in the process of doing a lot of work in this crawl space I've noted that that is NOT the only place where that galvanized tape is used, and not the only place where it is so loose as to be useless. Do you feel my pain? Yes, a homeowner trying to meet code and make sense of what professionals have done.
Some other weird things: they allow
water heaters in attics, and a number of my neighbors have this. No sane person would put a water heater in the attic unless that is the only possible place it could go. The poor plumbers--not the boss men, but the guys doing the fitting--said it is damned hard enough to get an EMPTY water heater up into an attic much less drain one and try to remove it for replacement. They too, think it's a pretty dumb idea--but guess what?
It's allowable code. Thankfully mine is in the garage. I actually think I would NOT have bought the home with a water heater in the attic.
On the electrical side of things, I just untangled a mystery today on this new house. Instead of a simple switched outlet under the sink, with a GFCI outlet, for the disposal--what is allowable code is a three wire cable (NM 14-3) coming from the breaker box, with the two 15A breakers tied together. One hot is for the dishwasher, the other hot for the disposal, sharing a neutral. But I do not have this! I have completely separate NM 14-2 cables. Both the disposal and the dishwasher or hardwired directly to each of their single cables. The disposal and the dishwasher, electrically at least, are unrelated. Why are their breakers tied together? This is not a “shared receptacle”. I've lived in a number of states, installed and replaced a number of disposals, and never seen such nonsense. Just because it's code and allowed doesn't mean it's a good idea. So, this evening's project is to complete the installation of an air switch. So, I have to undo a bit of bogus wiring, not bogus because it was done wrong or sloppy, but because this is the local code...and no GFCI on the disposal? Let's see, a non-double insulated motor, metal housing, connected to a steel sink, connected to a metal faucet. Those are precisely the kinds of conditions for which GFCI was invented. It may not be code here but one is going in; now I have a nice box with the GFCI outlet and the disposal plugs into that... Well through an air switch at least.
Onto more plumbing tomorrow. I've added pipe support to my list! Thank you,
@breplum