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Switching from RO to UF membranes made my life way easier

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design815
14 posts

- Totally get the anxiety - our first spring here, I watched the water go from clear to “iced tea” after a downpour.
- Swapping out the sediment filter helped, but it was packed with gunk way faster than I expected.
- I added a second, coarser pre-filter before the main one. It’s not overkill if your well gets that muddy.
- UF does a decent job, but on those heavy storm days, doubling up seems to keep things running smoother and saves the finer filters from clogging so fast.
- Honestly, it’s trial and error... but you’re not alone in thinking about extra layers.


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gingerm29
6 posts

That “iced tea” water look after a storm is all too familiar - been there, and it’s always a bit nerve-wracking. Layering filters really does make a difference, especially if you’ve got a shallow well or a lot of silt runoff. I’ve found that starting with a 50-micron spin-down filter before the usual sediment cartridge buys a lot more time between changes. One thing I’d add: check those seals and housings after a big rain, too. Sometimes a tiny leak can pull in even more debris. It’s definitely a process of tweaking, but you’re on the right track.


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birdwatcher71
20 posts

I know that “iced tea” look all too well. After a big storm last spring, our tap water was basically brown for two days. I ended up flushing the whole system and swapping out filters way sooner than I’d planned. The spin-down filter tip is spot on - mine’s a cheap plastic one from Amazon, but it’s saved me a ton on sediment cartridges. Still, I’ve noticed that even with the extra pre-filter, the cartridges clog up fast when we get those heavy rains.

check those seals and housings after a big rain, too. Sometimes a tiny leak can pull in even more debris.

That’s something I learned the hard way. Thought my filter housing was tight, but after a week of weird-tasting water, I found a hairline crack in the O-ring. Replaced it and things cleared up, but it made me wonder how many times I’d missed little leaks before.

Switching from RO to UF membranes - did you notice any difference in how often you had to change your filters? I’ve been tempted to try UF since RO wastes so much water (and my utility bill isn’t getting any smaller). But I’m not sure if UF can handle the amount of silt we get here after storms. My neighbor swears by his UF setup, says it’s less maintenance overall, but he’s on city water and I’m on a shallow well.

Anyone else running UF with well water? Curious if it actually holds up or if you end up swapping out pre-filters just as often. The cost of cartridges adds up quick... especially when you’re dealing with muddy runoff every time it rains hard.


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7 posts

Switching from RO to UF definitely made things easier for me, but it’s not a magic bullet - especially on well water after a storm. I manage a handful of rentals on shallow wells, and every time we get one of those “chocolate milk” rain events, the filters take a beating. RO was driving me nuts with the wasted water (and tenants complaining about slow flow), so I gave UF a shot in two of the houses last year.

Here’s what I’ve noticed: UF handles silt better than I expected, but only if you really beef up your pre-filtration. The spin-down filter is a must, and I actually doubled up with a 50-micron pleated filter before the usual 5-micron cartridge. That way, the UF membrane isn’t getting hammered by the big stuff. When I skipped that extra stage, my cartridges still clogged up fast - so honestly, the pre-filters are where you’ll keep spending money if your well gets muddy.

One thing I like about UF is it doesn’t waste water like RO, and you don’t get that “flat” taste some folks complain about with RO. But you’re right - if your silt load is high, you’re still swapping out those pre-filters after every big storm. I tried cleaning and reusing the pleated ones a couple times, but they never quite go back to normal. Maybe I’m just too picky.

I’d say UF is less maintenance overall, but only if you’re willing to stay on top of the pre-filter game. If you’re getting “iced tea” water after every rain, it might be worth looking into a sand separator or even a settling tank before your filters. One of my neighbors swears by his homemade settling barrel - basically just lets the heavy stuff drop out before it hits the filters. Not pretty, but it works.

Long story short: UF is easier than RO in some ways, but it won’t save you from swapping out cartridges if your well turns into a mud pit every spring. Still beats dumping gallons down the drain with RO, though... and my water bill thanks me for it.


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3 posts

Yeah, I’ve seen the same thing after big storms - once that well water turns to sludge, no filter setup is totally hands-off. I’ve tried those settling barrels too, just a 55-gallon drum with an outlet a foot above the bottom. Not pretty, but it catches a surprising amount of grit before it hits the filters. Still, pre-filters are a constant expense if you’re on shallow wells. Honestly, I’d rather swap a few cartridges than deal with RO’s waste and slow flow, but it’s always a tradeoff.


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