Leaks are exactly why I’m hesitant about under-sink filters. Had one go bad after a year—slow drip that warped the cabinet floor before I even noticed.
Had a tenant call me about a “musty smell” under the sink once—turned out the filter had been dripping for weeks. Cabinet was a mess. I get what you mean about “peace of mind beats a little lost counter space.” Countertop units aren’t pretty, but at least you notice issues fast. Under-sink setups are out of sight, out of mind... until they’re not. I’ve started leaning toward countertop for rentals just to avoid these headaches.
Yeah, it’s wild how quickly a tiny drip can cause major headaches. I totally get the appeal of countertop filters—easy to spot if something’s off, and you don’t have to crawl under the sink with a flashlight every few months. Under-sink ones look cleaner, but I’ve seen enough warped cabinets to know it’s not always worth it. Peace of mind does count for a lot, especially with rentals where you can’t check every week.
Had the exact same debate with myself when I moved in last year. I went with an under-sink filter because I liked the cleaner look, but man, installation was a bit more involved than I expected. Crawling around with a wrench and then worrying about leaks every time I opened the cabinet got old fast. If you’re not super handy or just want to keep things low-maintenance, countertop filters really do make life easier. Only downside for me was losing some counter space, but at least you can spot trouble right away instead of discovering it after your cabinet’s already soggy.
Only downside for me was losing some counter space, but at least you can spot trouble right away instead of discovering it after your cabinet’s already soggy.
Couldn’t agree more about the peace of mind with countertop filters. I’ve seen a few too many under-sink setups go sideways—one tiny drip and suddenly you’re replacing particle board. If you do go under-sink, use Teflon tape and double-check every fitting. But honestly, if you’re not comfortable tightening compression fittings or poking around with supply lines, countertop is just less risky. Counter space grows back faster than cabinets, in my experience...
I hear you on the under-sink leaks—been there, done that, and the warped cabinet base is still a sore spot. I’m all for countertop filters, even if they hog a bit of space. At least you can see if something’s off right away, instead of finding a puddle after it’s soaked in for hours.
Honestly, unless you’re super confident with plumbing, under-sink just feels like tempting fate. I tried to “DIY” one once, followed every instruction, and still ended up with a slow drip I didn’t catch for days. Never again. Countertop might look a little clunky, but I’d rather lose a few inches of workspace than risk water damage. Cabinets are way more expensive to fix than a little inconvenience at the sink.
If you’re the type who double-checks everything and doesn’t mind crawling under the sink, maybe it’s worth it. For me, I’ll take the peace of mind and just shuffle my toaster around.
