Those dried-out traps are sneaky, but I’m always a bit skeptical it’s *just* that. Last year, I dumped half my pantry down the laundry sink and still got whiffs of rotten eggs. Turned out the cleanout cap was loose behind the washer. Worth checking if you’re still getting weird smells after topping up all the drains. Sometimes it’s a combo of things, not just one culprit.
- Not saying you’re wrong, but I wouldn’t jump to the cleanout cap first.
- In my experience, 9 times out of 10 it’s a dried trap, especially if you’ve got a floor drain that never sees water.
- Before tearing into walls or moving appliances, I just pour a bucket of water down every drain and wait a day.
- If the smell’s still there, then yeah, time to check for loose caps or even cracked pipes.
- Sometimes it’s just the water heater acting up too—sulfur smell can come from the anode rod going bad.
- I try the cheap fixes before calling in a plumber... learned that the hard way after a $200 “diagnosis” that was just a dry shower trap.
Title: When your basement smells like rotten eggs: weird facts about wastewater mishaps
Before tearing into walls or moving appliances, I just pour a bucket of water down every drain and wait a day.
That’s a solid first step. I’d add that if you’re dealing with a persistent smell, it’s worth checking the traps under utility sinks and laundry tubs too—those get overlooked all the time. Sometimes folks forget about that old laundry sink in the corner, and if it hasn’t been used in months, that trap’s probably bone dry.
One thing I’ve run into is folks pouring bleach or drain cleaner down the drains thinking it’ll “kill” the smell. Not only does that not fix a dry trap, but it can actually mess with your pipes if you overdo it. Water’s all you need for this test.
If you’ve got a sump pit, ever notice if the smell gets worse after heavy rain? Sometimes groundwater can push sewer gases up through cracks or bad seals. Had a job last year where the culprit was actually a missing gasket on the sump lid—took forever to track down because everything else looked fine.
Curious—has anyone here ever had issues with backflow valves causing odors? I’ve seen some setups where those valves stick open or closed and let sewer gas sneak in. Wondering how common that is compared to dried traps or anode rods going bad.
Just for safety’s sake, always make sure there’s good ventilation when you’re poking around these areas. Sewer gas isn’t just stinky—it can be dangerous in high concentrations. If you ever get dizzy or lightheaded while investigating, step outside for fresh air right away.
Anyone ever tried those waterless trap primers? I’ve seen mixed results but never used one myself.
Had a tenant call me once about a “dead animal” smell in the basement, and I’ll admit, I was convinced it was a critter at first. Turned out to be a dry trap under a floor drain that hadn’t seen water in ages. Now I make it a habit to pour a jug down every drain in my rentals every few months, especially the ones nobody thinks about.
I’ve run into those backflow valves sticking, too. One place had a valve that was supposed to keep sewer gas out, but it got jammed with some debris and actually made things worse. Took me longer than I’d like to admit to figure that one out. I’m not wild about waterless trap primers, honestly—tried one in a utility closet and it worked for a while, but after a year or so the smell crept back. Maybe I just got a dud, but I stick with old-fashioned water now.
And yeah, ventilation is huge. I always crack a window or run a fan if I’m poking around down there. Not worth risking your health over a weird smell.
You nailed it with the water-in-the-drain trick. I swear, the simplest solutions are always the ones we forget about until our noses remind us. I tried one of those “eco” trap sealers once—supposed to last forever, but it just ended up smelling like a science experiment gone wrong. Honestly, nothing beats a good old jug of water and some fresh air. And yeah, sewer gas is no joke... I’d rather deal with a spider than that rotten egg stench any day.