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Rainwater toilets and greywater showers: City tries new water-saving tricks

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Posts: 4
(@sandra_king)
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- The “maintenance-free” pitch is a joke, totally agree there. I’ve pulled handfuls of sludge out of filters after just a few weeks. If you’re not cleaning, you’re risking clogs or worse.

- Backflow valves are non-negotiable. Seen too many folks try to save a buck and end up with contaminated lines. That’s not something you want to deal with at 2am.

- Plumbing codes are all over the place depending on where you live—some cities are way stricter than others. Had a client who installed everything perfectly but still had to rip out half his system because the inspector wanted a different kind of diverter.

Curious—has anyone tried those newer UV sterilizers in their setups? Worth it, or just another maintenance headache?


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science856
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(@science856)
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The “maintenance-free” pitch is a joke, totally agree there. I’ve pulled handfuls of sludge out of filters after just a few weeks.

Honestly, I get where you’re coming from, but I’ve seen some setups where the maintenance isn’t as bad as people make it out to be—especially if you size your filters right and pre-screen the water. My uncle’s rainwater system only needs a quick rinse every month or so, and he’s not exactly a neat freak. Maybe it depends on local water quality or how much debris you get? Not saying it’s ever truly “maintenance-free,” but sometimes the horror stories are a bit overblown.

About those UV sterilizers—tried one in a test rig at school. Maintenance wasn’t awful, but you do have to keep an eye on the quartz sleeve for buildup. If you’re already cleaning filters, it’s just one more step. Not sure it’s worth the cost unless your water’s really sketchy.


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math741
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I’ve seen the same thing with UV—if you’re already in there cleaning filters, wiping down the quartz sleeve isn’t a huge deal. But I do worry about folks skipping steps or letting things slide, especially if they think “maintenance-free” means they can just forget about it. Even a little buildup can mess with UV effectiveness. Out of curiosity, has anyone had issues with biofilm or algae in their storage tanks? I’ve seen that cause more headaches than the filters themselves, depending on how much light gets in.


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cooper_lee
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(@cooper_lee)
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- I get where you’re coming from on UV, but honestly, I’ve seen more issues crop up from folks ignoring the basics—like tank lids not sealing right or overflow screens missing.
- Even with a spotless quartz sleeve, if sunlight’s leaking in or there’s a spot for critters to get through, you’ll end up with algae or worse.
- Maintenance-free is a myth in these setups. I’ve had jobs where people thought “set and forget” was fine, then called me when their toilets started smelling swampy.
- Filters are important, but keeping tanks dark and sealed tight does more to stop biofilm than anything else I’ve seen.
- Just my two cents... sometimes the low-tech stuff makes the biggest difference.


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jwoof75
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(@jwoof75)
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Can’t argue with that—people get fixated on fancy tech and forget the basics. I’ve lost count of how many times I’ve popped open a tank and found the lid half off or a screen chewed through by mice. Here’s what I tell folks:
1. Check your seals every month—just run your hand around the lid and see if it’s snug.
2. Make sure overflow screens are actually in place and not clogged up with gunk.
3. Keep tanks out of direct sunlight or cover them up—UV only helps so much if algae’s getting a head start.
4. Don’t skip cleaning, even if it looks fine from the outside. Biofilm loves to hide in corners.

Honestly, most “problems” I get called for are just someone forgetting step one or two... Not glamorous, but it works.


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