Handy shortcuts for finding plumbing info quick

For old valves, sometimes I’ll take a quick pic and sketch out a map on my phone. Not perfect, but it saves me from guessing next time I’m down there.

That’s pretty much what I do too - snap a photo, scribble a few notes, and hope future-me remembers what past-me was thinking. I’ve tried those little plastic tags and they just end up brittle or faded after a year or two. Metal ones last, but yeah, getting them stamped or even just etched with a Dremel is more work than I usually want to put in.

One thing that’s helped me is using colored electrical tape. It’s not fancy, but if you stick to your own color code (like red for hot water shutoffs, blue for cold, yellow for gas), you can spot what’s what at a glance. The tape holds up better than the tags in my basement at least.

And about PDFs - totally agree, most of the stuff in my house predates the internet by decades. Sometimes I’ll find an old hand-drawn diagram taped inside the panel box or tucked behind a pipe... feels like finding buried treasure when that happens.

Colored tape is a game changer, honestly. I started doing that after getting tired of crawling around trying to read faded marker or half-peeled labels. The only thing I’d add - if you’ve got a lot of pipes running close together, sometimes the tape colors can get confusing in bad lighting. I started wrapping a little strip around the pipe and then writing the valve function right on the tape with a Sharpie. Not pretty, but it’s survived a few years so far.

And those old diagrams? Total gold. I once found one behind a basement panel that mapped out every shutoff in the house, even labeled “grandma’s bathroom” (which doesn’t exist anymore). Stuff like that makes me wish people still left notes for the next owner.

I do wish there was a better digital solution for older houses, though. Tried scanning my own notes into Google Drive, but when you’re in a crawlspace with a flashlight between your teeth, paper still wins out most days.

Colored tape is a lifesaver, but I’ve run into the same issue with colors blending together in dim corners. I started using different patterns - like diagonal stripes or double wraps - for hot vs. cold, and it’s helped a bit. Sharpie on tape is my go-to too, though sometimes it smudges if the pipe sweats. Not perfect, but better than nothing.

I once moved into a house where someone had left a whole binder of hand-drawn diagrams and notes about the plumbing and electrical. It was like finding buried treasure. Made tracing lines so much easier, especially when the pipes disappeared behind walls.

Tried digital too, but honestly, crawling under the sink with a phone or tablet just doesn’t work for me either. Paper gets dirty, but at least you can shove it in your pocket or wedge it somewhere nearby. Maybe one day there’ll be an app that actually works in those tight spots... until then, I’m sticking with tape and scribbles.

Tried digital too, but honestly, crawling under the sink with a phone or tablet just doesn’t work for me either.

I get where you’re coming from, but I’ve actually had some luck snapping quick pics with my phone before I start. Not perfect, but it’s saved me a few trips back and forth when I forget which valve goes where. Tape and scribbles are solid, but sometimes a photo clears up what my handwriting can’t. Just gotta remember to wipe the lens after working in the crawlspace...

sometimes a photo clears up what my handwriting can’t

I get the appeal, but honestly, I’m always a bit wary about relying on my phone around water and grime. One slip and it’s toast. I still swear by labeling pipes with painter’s tape and a Sharpie - old school, but you can’t drop a roll of tape down the drain. Plus, if you’re working in tight spots, fumbling with a phone just feels like asking for trouble. Maybe I’m just paranoid, but better safe than sorry...

I get what you mean - phones and water definitely don’t mix. I’ve dropped mine in a bucket before, so I’m a bit paranoid too. Tape and Sharpie are cheap and hard to mess up, but sometimes my notes get smudged or peel off after a while. Has anyone tried those reusable silicone labels? Wondering if they’re worth the few extra bucks or just another gimmick...

Tried those silicone labels on a couple of jobs where I was tired of tape getting soggy or falling off. Honestly, they're not magic, but they do hold up a lot better around water and grime. Couple things to keep in mind: they only stick well to clean, smooth surfaces - if there's any grit or corrosion, they'll peel off sooner than you'd hope. Also, if you write on them with the wrong marker, it can smear just like tape.

One trick I picked up is using a fine-tip paint pen instead of a Sharpie. It sticks to silicone better and doesn't rub off as easily. The labels are reusable, but after a few months in a crawlspace, the writing gets pretty faded. Still, I’d say they’re a step up from masking tape, especially for stuff you need to relabel often.

Don’t feel bad about being paranoid - phones and water are a bad combo and I’ve lost two over the years. If you’re organized enough to even label your work, you’re ahead of half the folks out there...

I get the appeal, but I’m still not totally sold on silicone labels for plumbing jobs, especially in tight or dirty spots. Even with a paint pen, the writing never seems to last as long as I’d want - after a couple months, it’s just a smudge if there’s any condensation or dust. I’ve actually had better luck with those old-school aluminum tags and a cheap engraving pen. They’re not as quick, but they stay readable forever, and you don’t have to worry about the surface being perfectly clean.

I’m probably just overly cautious, but I’d rather spend the extra minute making sure my labels are still there and legible when I need them. Nothing worse than crawling back under a sink and realizing all your markings have vanished. Just my two cents...

I’ve actually had better luck with those old-school aluminum tags and a cheap engraving pen. They’re not as quick, but they stay readable forever, and you don’t have to worry about the surface being perfectly clean.

- I hear you on the aluminum tags. I’ve used them in commercial settings where things get messy fast - grease, dust, even the occasional splash from a busted valve. Never had one fail on me yet.
- Silicone labels are fine for quick jobs, but if you’re dealing with any kind of moisture or grime, they just don’t hold up. Paint pens are even worse if there’s condensation - writing turns into a Rorschach test after a few weeks.
- One thing I’ve started doing: if I have to use a label in a tough spot, I’ll double up - engraved tag plus a backup photo on my phone. That way if something does go missing or gets unreadable, at least I’ve got a reference.
- For tight spaces, sometimes I’ll zip-tie the tag to a nearby pipe instead of trying to stick it right on the fitting. Not perfect, but better than nothing when you’re working blind behind a water heater.

Curious - has anyone tried those heat-shrink labels? Supposedly they’re more durable than silicone or tape, but I haven’t tested them in real-world conditions yet. Wondering if they actually hold up under constant condensation or if it’s just marketing hype...

Aluminum tags really are tough to beat, especially when things get messy. I’ve had the same experience - never seen one fail, even after years in a damp basement. The backup photo idea is smart too, I do that with electrical panels sometimes. Haven’t tried heat-shrink labels myself, but I’m skeptical about them holding up long-term in wet spots. Marketing always makes stuff sound bulletproof, but real life is another story...

Aluminum tags have definitely saved me a ton of headaches, especially when I’m crawling around old crawlspaces. I tried the heat-shrink labels once on a sump pump line - looked great at first, but after a year it was just a smeared mess. The photo backup’s a good call, though. I started snapping pics of shutoff valve setups too, since my handwriting on tags is, uh, not the best...

I get the appeal of aluminum tags, but I’ve seen them corrode or get knocked off in tight spots - especially where there’s condensation or a lot of foot traffic. Honestly, paint markers right on the pipe have held up better for me in some cases. Photos are handy, but if you’re in a pinch and your phone’s dead or you can’t get a signal, nothing beats a clear, permanent mark right where you need it. Just my two cents...

I’ve run into the same problem with aluminum tags, especially in my basement where it gets damp. They just don’t last, and I hate having to replace them every couple of years. Paint markers are a solid workaround - cheap, quick, and you can see them at a glance. I’ve even used nail polish in a pinch when I couldn’t find my marker, and it’s still holding up on the shutoff valve.

One thing I’ve wondered about is whether anyone’s tried those colored zip ties as a backup? I saw someone use them to color-code hot and cold lines, and it seemed pretty clever for folks who don’t want to write directly on the pipe. Not sure how they’d hold up long-term though... Has anyone had luck with that kind of system?

Colored zip ties actually work pretty well for quick ID, at least in my experience. I’ve used them on PEX lines and they haven’t gotten brittle or faded after a couple years, even in a crawlspace. Only thing is, if you’ve got a lot of lines close together, it can get confusing unless you stick to a strict color code. Has anyone tried using heat-shrink tubing with labels? I’ve seen it on electrical but not much on plumbing.

Heat-shrink tubing with labels is something I’ve mostly come across in electrical too, but now you mention it, I’m wondering why we don’t see it more on PEX or copper. It seems like a solid way to keep things readable long-term, especially if you’re dealing with a rat’s nest of lines. The only snag I can think of is that it’s a bit more effort compared to zip ties, especially if you’re retrofitting - cutting the line, sliding the sleeve on, shrinking it down... not always practical when you just want to tag something fast.

Only thing is, if you’ve got a lot of lines close together, it can get confusing unless you stick to a strict color code.

I hear you there. I've had jobs where every color code system falls apart after the third guy touches it. Ever tried using those wrap-around cable markers? They’re not as neat as heat-shrink but you can slap them on after the fact and write whatever you need - hot/cold, zone numbers, whatever.

Curious if anyone’s run into issues with marker ink fading over time under crawlspace conditions. Do those hold up any better than colored ties?

Never had much luck with marker ink under crawlspaces - humidity and dust seem to wipe them out after a year or two, especially the cheaper pens. The colored ties hold up better in my experience, but then you’re stuck remembering what each color means unless you label a legend somewhere. Anyone ever try the laser-printed labels with clear heat-shrink over them? Wondering if that’s overkill or worth the hassle for big jobs.

Laser-printed labels with heat-shrink actually aren’t overkill at all, especially if you’re dealing with a big job or want to avoid crawling back under there in a couple years just to redo everything. I’ve used them on some longer-term projects, and they hold up way better than marker or tape - no smudging, no fading, and the heat-shrink keeps out moisture and dust. It’s a bit more work upfront, but it pays off when you can actually read what you wrote five years later.

Colored ties are handy for quick jobs, but like you said, unless you keep a legend somewhere accessible, it’s easy to forget what blue or yellow was supposed to mean. I’ve tried sticking a laminated legend near the crawlspace entrance - helps jog the memory when you’re down there.

If you’re already investing time in labeling, might as well do it right the first time. The hassle is mostly in the setup, but after that, it’s smooth sailing.

Honestly, I thought the heat-shrink labels were overkill at first, but after crawling around under my house for the third time because my sharpie labels faded, I’m totally on board. The upfront hassle is worth it. Here’s what worked for me: I printed out a basic map of my plumbing layout and stuck it in a ziplock bag by the water shutoff. That way, even if I forget what “red tie” meant, I’ve got a backup.

One thing I’d add - if you’re doing this, take photos of each section as you go. It’s saved me more than once when I couldn’t remember which pipe was which after everything got covered up again. Just snap a pic with your phone and maybe jot a note on it. Doesn’t have to be fancy.

I do like the colored ties for quick fixes, but yeah, unless you’re religious about keeping that legend updated, it gets confusing fast. The laser-printed stuff is just more permanent. If you’re putting in the work now, might as well make life easier for future-you... or whoever has to deal with it next.

Here’s what worked for me: I printed out a basic map of my plumbing layout and stuck it in a ziplock bag by the water shutoff.

Heat-shrink labels are nice, but honestly, I’ve managed just fine with a combo of colored zip ties and a sharpie - if you use the industrial ones. Sharpie fades, sure, but if you wrap a bit of clear packing tape over the writing, it’ll last years. That map in a ziplock is a solid idea, though. I’ve had tenants call in a panic because “the blue tie” didn’t mean anything to them... so I get the backup plan. Photos help, but I still swear by just keeping it simple and updating as you go. Too much labeling and you end up second-guessing yourself anyway.

Heat-shrink labels are nice, but honestly, I’ve managed just fine with a combo of colored zip ties and a sharpie - if you use the industrial ones. Sharpie fades, sure, but if you wrap a bit of ...

That’s a good point about over-labeling - been there myself. I used to have every valve tagged and color-coded, but after a while, even I couldn’t remember what “green” meant vs “yellow.” The map in a ziplock is a lifesaver, especially for tenants who aren’t familiar with the setup. Ever tried QR codes? I stuck one by the main shutoff that links to a photo guide on my phone. Not perfect, but it’s helped in a pinch.