the blueprints were more like “suggestions.” Half the pipes went where they were supposed to, but then you’d find a random detour behind a wall or some mystery valve that didn’t show up anywhere.
That’s the thing—boiler pipework looks complicated because, in a lot of older places, it really *is* complicated. People forget how many “creative” fixes get layered on over the decades. I’ve seen pipes rerouted for the weirdest reasons—like someone wanted to hang a shelf, so they just bent the pipe around it. Mapping it out yourself is smart, but I’d argue you should always expect at least one hidden surprise, even if you think you’ve got it all figured out. Permits only tell half the story... the rest is usually buried in drywall or under floorboards.
I get what you’re saying about “creative” fixes—seen my fair share of those, like pipes rerouted just to avoid a cat’s favorite napping spot. But I’d push back a bit on the idea that you should *always* expect a hidden surprise. Sometimes, especially in buildings where the same family’s owned it forever, things are actually mapped out pretty well. Not common, but it happens.
Permits only tell half the story... the rest is usually buried in drywall or under floorboards.
That’s true, but I’ve found that if you can get your hands on old inspection reports or even talk to previous owners (if they’re around), you can piece together more than you’d think. Ever tried using one of those cheap endoscope cameras? Saved me from tearing up a wall once when I thought there was a leak—turned out to be an old soda can wedged behind the pipe. Sometimes it’s not as mysterious as it looks... but yeah, sometimes it’s way weirder.