Dry traps are sneaky—happened to me after we went on vacation for a couple weeks. Couple gallons of water and problem solved, but I definitely spent a few minutes panicking first.
Been there too—came home after a long trip and the whole basement reeked. It’s wild how fast those traps dry out. Honestly, for anyone with a basement floor drain or unused bathroom, pouring water down every month or so is just basic maintenance. I know some folks like enzyme cleaners, but I’m not convinced they do much for this specific issue. Water is cheap and works.
About mineral oil: it’s actually not as messy as it sounds if you just pour a thin layer after the water. It floats on top and slows down evaporation. Not a must-do, but if you’re away for a while, it’s worth considering. I’d rather deal with a little oil than gamble with sewer gas.
And yeah, never feel silly calling the utility company for weird smells. Gas leaks are nothing to mess with, and even if it’s “just” a wastewater issue, better safe than sorry.
Mineral oil’s a neat trick, but I’ve always hesitated because I worry about what happens when you flush the trap out later—does that just send oil down the drain? I get that it’s a small amount, but I try to keep anything non-biodegradable out of our wastewater. Still, I totally get the appeal if you’re going to be gone awhile.
One thing I’ve found helpful is using a bit of vegetable glycerin instead. It’s eco-friendlier, and it seems to do the same job of slowing evaporation. Not sure it works quite as well as mineral oil, but at least I don’t feel guilty about it.
And yeah, those smells can be so intense it’s honestly hard not to panic. We had a floor drain go dry last summer, and for a couple days I was convinced something had died in the walls. Just another reminder that a little regular maintenance—water or otherwise—saves a lot of stress later on.
I hear you on the mineral oil—I've always been a bit uneasy about pouring anything down the drain that isn't water or something biodegradable. Glycerin's a clever workaround, though I do wonder if it evaporates faster in really dry basements. For me, I just set a calendar reminder to dump a pitcher of water down the floor drains every couple weeks. Costs nothing, takes two minutes, and I don't have to worry about what I'm sending into the pipes. Those rotten egg smells are brutal... once had guests over and it hit right as we sat down for dinner. Never again.
For me, I just set a calendar reminder to dump a pitcher of water down the floor drains every couple weeks. Costs nothing, takes two minutes, and I don't have to worry about what I'm sending into the pipes. Those rotten egg smells are brutal... once had guests over and it hit right as we sat down for dinner. Never again.
That’s honestly the most reliable method I’ve seen—just plain water, nothing fancy. I’ve been in more basements than I care to count, and you’d be surprised how many folks try to “outsmart” the system with all sorts of concoctions. Mineral oil, glycerin, even one guy who swore by a shot of vodka (not recommended, unless you want your house to smell like a college bar instead of sulfur).
Glycerin does evaporate a bit faster in dry environments, you’re right to wonder. It’s more viscous than water, so it lingers longer, but if you’ve got a dehumidifier running or your basement’s just bone dry, it’ll still disappear eventually. Honestly, the old pitcher-of-water trick is hard to beat. It’s also a good excuse to check the drain for any slow clogs or buildup while you’re at it.
Funny thing—one time I got called out to a house where the owner was convinced there was a sewer leak. Turns out he’d just let his floor drain dry out for months. The smell was so strong it hit you before you even got your shoes off. A couple gallons of water later, problem solved. He looked at me like I’d performed some kind of magic.
The only thing I’d add is if you’re going away for a long stretch, maybe toss a little mineral oil on top of the water in the trap. It forms a barrier and slows evaporation, but yeah, I get being cautious about what goes down the drain. Just don’t let it go bone dry, or you’ll be reliving that dinner party moment. The nose knows when something’s off...
He looked at me like I’d performed some kind of magic.
That’s the thing, right? It’s almost always the simplest fix. I know people swear by adding oil or whatever, but honestly, water’s free and doesn’t gum up the works. I’ve tried mineral oil when I left town for a month, but it felt weird pouring oil down the drain—just not my style. Plus, if you’re already checking for clogs, you’re killing two birds with one stone. No need to overcomplicate it.