Heat’s always been more reliable for me, though sometimes nothing short of cutting gets it done.
That’s been my experience too, especially with old plumbing. I’ve tried freezing spray a couple times and honestly, it didn’t make much difference on anything that’s seen decades of corrosion. For stuck stems, I always go with two wrenches—one to hold the body steady, the other to turn the stem nut. If it doesn’t budge, a little controlled heat with a small torch usually does the trick (just gotta watch for anything flammable nearby—ask me about the time I singed some insulation...).
If you’re dealing with something that just won’t move, I’ve had luck soaking it with penetrating oil overnight. Occasionally, though, there’s just no saving it and you have to cut and replace. Not the most elegant solution, but sometimes it’s the only way. And yeah, mouse nests... found one packed into a wall cavity once. Never expected to see that.
Cutting’s always the last resort for me, but sometimes there’s just no way around it. I’ve had a few old shower stems that wouldn’t budge even after days of soaking in PB Blaster and a good dose of heat. Ended up snapping one off once—talk about a headache. These days, I’m extra careful with the torch, especially in tight spots. Funny how you never really know what you’ll find behind those walls... insulation, nests, or just decades of grime.
Funny how you never really know what you’ll find behind those walls... insulation, nests, or just decades of grime.
Yeah, that’s the truth. I’ve seen everything from mouse skeletons to a full-on wasp hive once—makes you think twice before sticking your hand in there. About the torch, though, I’m always a bit skeptical using heat near old solder joints or anything close to wood framing. Sometimes the risk outweighs the reward, especially if you’re not sure what’s lurking back there.
When you say the stem wouldn’t budge after PB Blaster and heat, did you try using a stem wrench with a breaker bar? Or maybe tapping it gently with a hammer to break up corrosion? I’ve had mixed luck—sometimes it works, sometimes it just makes things worse. Curious if you’ve ever tried freezing spray instead of heat? Supposedly it can shock the threads loose, but I’ve only used it once or twice with little success.
Freezing spray’s a mixed bag for me too—sometimes it helps, sometimes it just makes the metal sweat and that’s about it. I’ve had better luck with a breaker bar and a little patience, but yeah, tapping with a hammer can go either way. Once snapped an old brass stem clean off doing that... not my finest hour. Heat always makes me nervous near old framing—one spark and you’re dealing with way more than stuck threads. Sometimes you just gotta know when to walk away and rethink the approach.
Heat always makes me nervous near old framing—one spark and you’re dealing with way more than stuck threads.
That’s exactly what’s been holding me back from trying a torch. I keep seeing folks on YouTube just go for it, but my house is old enough that I’m convinced the walls would just go up like a tinderbox. The breaker bar trick sounds promising though—I’ve only got a regular wrench and I’m always worried about rounding things off or snapping them, especially since I have no idea how long some of these fittings have been sitting there.
I did try freezing spray once, but honestly, it just made everything cold and wet. Didn’t seem to do much except make my hands numb. Maybe I wasn’t patient enough? Or maybe it just doesn’t work as well on really old plumbing.
Curious if anyone’s ever tried those penetrating oils that claim to “creep” into threads? WD-40 didn’t do much for me, but there are some others out there people swear by. Is it worth tracking one down, or is that just another thing that works sometimes and not others?
Also, when you say “walk away and rethink the approach,” what does that usually look like for you? Do you end up calling in a pro, or is it more like taking a break and coming back with fresh eyes? I keep getting stuck in this loop of “maybe if I just try one more thing...” and then worrying I’ll make it worse.
Would love to hear if anyone’s found a method that feels less risky than heat but actually works on stubborn stems. Or maybe there’s some weird trick out there I haven’t heard of yet...