Itchy skin could definitely be from trace chemicals, but bacteria’s a real possibility too, especially with greywater. Carbon filters are great for removing organics and chlorine, but they don’t catch everything. I’ve seen UV or even a basic sediment filter help, but it really depends on what’s in your source water. Sometimes you just can’t see the problem until it shows up on your skin...
- Gotta say, I’m not totally sold on UV for greywater. It’s good for killing bacteria, but if there’s a lot of suspended solids, the UV can’t always reach everything.
- Sediment filters are decent, but they won’t do much for dissolved stuff that might be causing skin issues—like soaps or detergents left in the water.
- I’ve seen people have better luck with a multi-stage setup: sediment filter first, then carbon, then maybe UV if you’re really worried about bugs.
- Honestly, sometimes it’s just trial and error. Had a job where we swapped out a carbon filter for a ceramic one and the skin problems cleared up... weird how every system acts different.
Funny thing, I’ve actually seen a UV setup work alright in one of those tiny house projects, even though the water was pretty murky going in. They had a really fine mesh pre-filter—like, annoyingly high maintenance, but it kept enough gunk out that the UV made a difference. Still, I get what you mean about UV not being magic. If you skip the pre-filtering, it’s basically pointless.
On the skin irritation bit, I’m with you on the carbon not always solving things. Had a customer who went through every filter type under the sun—sediment, carbon, ceramic, even tried a fancy “bio” filter. Turned out their detergent just didn’t rinse out well in low-flow setups. Switched to a different soap and bam, problem solved. Sometimes it’s not even the filter that’s the issue... it’s what’s going down the drain in the first place.
Multi-stage is great if you’ve got the space and patience for maintenance. Most folks I know start simple and only upgrade when something goes sideways. Trial and error is kind of the name of the game with greywater stuff.
Yeah, pre-filtering really is the unsung hero in these setups. I’ve seen people skip it and end up with UV bulbs caked in gunk within weeks—total waste. Maintenance is always the sticking point, though. Folks underestimate how much time those fine mesh filters eat up. And you’re spot on about soaps—sometimes it’s just a matter of switching brands or using less. Filters can only do so much if the source is off. Trial and error sums it up perfectly.
You nailed it with the “trial and error” bit. I remember the first time I tried to retrofit one of my properties with a rainwater flush system—thought I was clever skipping the pre-filter to save a few bucks. Fast forward two months, and I’m elbow-deep in the tank, scraping out what looked like a science experiment gone wrong. Learned my lesson quick: pay now, or pay way more later.
Maintenance is definitely where folks get tripped up. Those fine mesh filters are like needy houseplants—ignore them for a week and suddenly you’ve got problems. I do think people overthink the soap issue sometimes, though. Swapping to one of those “eco-friendly” brands made a bigger difference than I expected, but you’re right, if you’re dumping in half a bottle every shower, no filter’s gonna keep up.
It’s kind of fun figuring out what works (when it’s not flooding your laundry room). Anyway, hats off for sticking with it—most people give up after the first clog.