Title: Handy shortcuts for finding plumbing info quick
I’ve run into the same issue with PEX—tracing it behind finished walls is a headache. I’ve tried using thermal cameras, but unless there’s hot water running, you’re just staring at a blank screen. The stethoscope trick actually works better than most people think, especially if you can get someone to turn on a faucet while you listen along the wall.
One thing I’ve found helpful is using a stud finder with a deep scan mode. It won’t pick up the PEX itself, but sometimes you can spot where holes were drilled through studs for the pipe runs. Not foolproof, but it’s saved me from opening up the wrong section more than once.
And yeah, magnets are useless here—PEX might as well be invisible to them. I’ve even tried those little inspection cameras you snake through outlet holes... hit or miss, but worth a shot if you’re desperate and don’t want to tear up drywall blindly.
- Totally get what you mean about PEX being a pain to trace. I’ve wasted more time than I care to admit poking around behind walls, hoping to get lucky.
- The stud finder trick is underrated. It’s not perfect, but when you’re trying to avoid making Swiss cheese out of your drywall, every little clue helps.
- Those inspection cameras are a gamble. I borrowed one from a buddy—sometimes it’s like magic, other times you just see insulation and cobwebs. Still better than blindly cutting though.
- Never had much luck with magnets either... PEX might as well be made of air for all the good they do.
Honestly, you’re doing all the right stuff without spending a fortune on fancy tools. Sometimes it’s just trial and error, but sounds like you’ve got the patience for it. Hang in there—it gets easier once you’ve opened up a few walls and learned the weird routes plumbers take.
Man, tracing PEX is like playing hide and seek with a ghost. I’ve had moments where I’m convinced the pipe just teleported to the other side of the house. The stud finder trick is a lifesaver, even if it’s just giving you a vague idea of where not to drill. I tried using one of those cheap endoscope cameras from Amazon once—thought I was being clever, but all I got was a blurry close-up of insulation and what might’ve been a spider nest. Still, better than swinging a hammer at random.
Magnets are basically useless for PEX, yeah... unless you’re hoping to find an old nail or two. Honestly, after opening up a few walls and seeing the spaghetti mess some plumbers leave behind, I just expect the unexpected now. Sometimes you get lucky and find a straight run, other times it’s like they were trying to win an award for creativity.
Trial and error seems to be the name of the game. At least you get some good stories out of it—like that time I found an old sandwich wrapper inside my wall. No idea how it got there...
Title: Tracing PEX: Sometimes Blueprints Actually Help
I get where you’re coming from with the “expect the unexpected” thing—some of these runs look like they were mapped out by a toddler with a crayon. But I’ve actually had a bit more luck lately digging up old blueprints or permit docs from the city. Not saying they’re always accurate (sometimes it’s just wishful thinking), but every now and then you get a halfway decent idea of where the main lines are supposed to run. It’s saved me from punching unnecessary holes in the drywall more than once.
I know not everyone has access to that stuff, especially in older houses, but if you can track down even a rough schematic, it’s worth a shot. I used to think it was pointless because “nobody follows the plans,” but turns out, sometimes they do... or at least close enough that you can avoid the worst surprises.
About those endoscope cameras—I hear you on the blurry insulation shots. I tried one of those WiFi ones that hooks up to your phone, and it was basically like watching a horror movie filmed through a potato. Still, I did manage to spot a junction box I didn’t know existed, so I guess it wasn’t a total waste.
One thing I’d add: thermal cameras aren’t just for pros anymore. The cheap phone attachments aren’t perfect, but if you run hot water through the PEX for a few minutes, sometimes you can actually see the path in the wall. Not 100%, but better than nothing when you’re desperate.
And yeah, magnets are dead weight for this job. Unless you want to collect every stray screw in your wall...
Funny about the sandwich wrapper—I once found an old Polaroid wedged behind some plaster. No idea who those people were, but they looked like they were having a way better time than I was crawling around in attic dust.
- You’re right, blueprints can be surprisingly useful, even when they’re a little off. I’ve had times where just a rough city permit sketch gave me enough to dodge a pipe and save a wall.
- Endoscope cameras are hit or miss for sure. I once spent half an hour staring at insulation fibers before realizing the pipe was on the other side of a stud.
- Thermal cameras—totally underrated. The phone ones aren’t perfect but they’ve bailed me out more than once, especially on late-night calls when you just need to find that leak fast.
- Funny thing about old houses: sometimes you find more history in the walls than plumbing info. I once pulled out a 1970s beer can... priorities were different back then, I guess.
- Don’t get discouraged by the wild-goose chases. Sometimes it’s just a process of elimination and luck, but every shortcut helps.
