Yeah, drafts can really mess with smoke pens—I've had readings go all over the place just because someone walked by. I get what you mean about candles; sometimes you just need something quick, even if it's not textbook. As for shutoff valves, I always double-check now, especially in older buildings where things aren't always labeled right. It's those little mistakes that stick with you and make you more careful next time. Funny how the simplest tools can trip you up the most...
Drafts are the sneakiest culprits, right? I’ve chased smoke pen trails halfway down a hallway before realizing someone just opened a window. As for shutoff valves, I learned the hard way—once spent 20 minutes turning off the wrong one in a basement maze. Now I slap a bit of neon tape on ‘em when I find the right one. Not pretty, but it saves me from playing plumbing roulette next time. Candles, though... I still keep one in my kit, even if it’s not “by the book.” Sometimes you just need to see that flicker.
I get the appeal of the candle trick, but I’ve actually had more luck with a cheap handheld anemometer—those little wind speed gadgets. Not as old-school, but it’s saved me from chasing my own tail when drafts are bouncing around. The neon tape idea is solid, though. I tried color-coded zip ties once, but they kept getting snagged on stuff in tight crawlspaces... ended up switching back to just marking up the pipes with a Sharpie. Not pretty either, but at least it sticks around.
I hear you on the zip ties—those things are a pain in tight spots. I’ve had Sharpie marks rub off after a year or two, though, especially if there’s condensation. Lately I’ve just been using painter’s tape and jotting notes right on it. Not fancy, but easy to peel and update when things change.
I hear you on the zip ties—those things are a pain in tight spots.
I get where you’re coming from with the painter’s tape—super handy for quick notes, and I’ve used it in a pinch. But honestly, I’ve had mixed luck with it sticking long-term, especially in basements or crawl spaces where it gets damp. Sometimes it just peels off and ends up on the floor, which is a pain when you’re trying to keep track of what’s what.
I’ve actually started using those plastic key tags with the little paper insert. They’re cheap, you can write whatever you want, and they hold up better than tape or Sharpie marks. Plus, if something changes, you just swap out the paper. Not perfect, but it’s saved me a few headaches when tenants call about “that weird pipe in the laundry room.”
Funny thing—one winter I labeled all the shutoff valves with painter’s tape, and by spring half of them were gone. Maybe it’s just my luck, but I’d rather over-label than have to guess in a hurry.