I’ve wondered the same—like, what exactly counts as “regular” for rinsing? And does anyone know if those filters actually do anything long-term, or is it just a money pit? I’m not convinced the city’s guidelines are based on real-world use. Has anyone tried just skipping the filter altogether and seen a difference?
I’ve managed a few buildings with these setups, and honestly, “regular” rinsing is kind of a moving target. If you’re following the city’s guidelines to the letter, you’ll be rinsing and swapping filters way more often than you need to. Half the time, those filters still look brand new when I pull them out. I get they’re erring on the side of caution, but it does feel like overkill.
Long-term, the filters do catch gunk—especially if you’ve got older pipes or tenants who treat drains like garbage disposals. But I’ve also seen people skip a filter change (or two… or five), and unless you’re letting stuff really build up, it doesn’t seem to make much difference in performance. Water pressure stays about the same, and nobody’s complained about weird smells or anything.
That said, I tried running one unit without the filter for a month as an experiment—just to see what would happen. Nothing catastrophic, but after a while there was some sediment buildup in the toilet tank that took a bit of elbow grease to clean out. Not a disaster, just more maintenance on the back end.
If you’re handy and don’t mind checking things yourself, you can probably stretch out filter changes way beyond what the city says. But if you’ve got tenants who aren’t exactly gentle on plumbing, skipping filters might come back to bite you.
Bottom line: filters aren’t total snake oil, but they’re not magic either. Mostly just another thing to keep an eye on... like everything else with these “innovative” setups.
Rainwater and greywater systems are definitely a mixed bag when it comes to maintenance. I’ve been called out to troubleshoot a few setups where the city’s filter change schedule was being followed to the letter, and honestly, I’ve seen the same thing—filters coming out looking almost untouched. It’s hard not to feel like some of those guidelines are written by folks who’ve never actually had to crawl under a sink at 2am.
That said, I’ve also seen the flip side. One building I worked on had a maintenance guy who figured he’d “let it ride” for a while, since everything seemed fine. A few months in, we started getting complaints about slow flushes and weird noises from the pumps. Pulled the filters and they were absolutely caked—looked like someone tried to strain soup through them. Turns out, the tenants were flushing all sorts of stuff they shouldn’t have been, and the filters were the only thing standing between that and a much bigger headache.
I get the temptation to stretch out filter changes, especially if you’re handy and can keep an eye on things. But with these systems, it’s not just about what you see—it’s what you don’t. Sediment can build up in lines, pumps can get gummed up, and before you know it, you’re dealing with a full-blown backup or pump failure. That’s when the “extra maintenance” turns into an emergency call and a much bigger bill.
If you’ve got reliable tenants and newer plumbing, you can probably get away with pushing the intervals a bit. But in my experience, it’s usually worth popping the filters out for a quick check every so often, even if you don’t swap them right away. Saves a lot of hassle down the line.
These setups are great for saving water, but they definitely add a layer of complexity. Not magic, not snake oil—just another thing to keep tabs on, like you said. And yeah, sometimes it feels like the city’s just covering their bases with the guidelines, but I’d rather err on the side of caution than end up ankle-deep in greywater at 3am...
Yeah, you nailed it—those city schedules are more about covering liability than real-world conditions. I’ve seen filters look spotless after months, but then you get that one random clog and suddenly it’s chaos. One thing I always tell folks: don’t trust your nose or eyes alone. Sometimes the gunk builds up where you can’t see it, and by the time there’s a smell or a slow flush, you’re already in trouble. I’d rather spend five minutes checking a filter than spend my night wrestling with a pump that’s full of who-knows-what... Not glamorous work, but it beats an emergency any day.
I hear you on the filters. I tried to stretch mine a bit longer last year to save a few bucks, and of course, that’s when it backed up. Ended up costing more in the long run. Is there really any way to tell when it’s about to go, or is it just luck?