Regular testing is good, but honestly, tossing out working equipment just because it's older seems wasteful to me. I've had detectors last years without issues—just replaced batteries and did routine checks. Sure, sensors degrade eventually, but manufacturers often push shorter lifespans than necessary.
"Had one at work that tested okay but missed a minor leak—luckily caught it early."
Fair point, but that's why redundancy matters. I keep two detectors in critical areas—one newer, one older—and stagger replacements. That way I'm not chucking perfectly functional gear prematurely. Saves money and reduces waste... win-win in my book.
I get where you're coming from about redundancy, but I'd be cautious about relying too heavily on older detectors—even as backups. Had a similar mindset myself until a couple years ago, when we had a scare at home. Our older detector passed every routine check, batteries fresh and everything, but completely missed a slow leak from our stove. Luckily, my wife noticed a faint smell and we caught it early enough.
Since then, I've been more skeptical about keeping detectors past their recommended lifespan. Sure, manufacturers might play it safe with shorter lifespans, but sensors do degrade quietly over time—even if they still test okay. For me personally, peace of mind outweighs the extra cost or waste factor. I still hate tossing gear that's technically "working," but after experiencing that close call firsthand... I'd rather err on the side of caution.
"sensors do degrade quietly over time—even if they still test okay."
Couldn't agree more with this. Had a similar issue at my place a while back—detector seemed fine, passed every test, but when I was working on a client's home, I noticed their newer detector picked up a leak mine probably would've missed. Made me rethink my own setup. Now I always recommend clients stick to the manufacturer's lifespan guidelines. Better safe than sorry, especially with gas leaks...
Had a similar experience a couple years back. Detector seemed fine, passed all the usual tests, but tenants started mentioning occasional weird smells. I figured it was nothing since the detector was silent, but decided to check anyway. Turns out there was a tiny gas leak behind the stove that my older detector just wasn't picking up. Replaced it right away with one of those newer models and sure enough, it lit up as soon as I powered it on.
Definitely changed my thinking on relying solely on the test button—these sensors quietly lose their sensitivity over time. Now I just mark the install date clearly and replace detectors according to manufacturer guidelines, even if they seem fine. Better than gambling on safety, especially when other people are involved.
Good points overall, but personally I wouldn't rely completely on just replacing detectors by the book. Had a similar scare myself and ended up getting a professional inspection done every couple years. Yeah, it's an extra cost, but sometimes leaks happen in weird spots that even newer detectors don't catch right away. Better safe than sorry, especially if you've got tenants involved...
