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

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sarahrunner
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I’ve had both in different places, and honestly, HDPE does seem to handle roots better—less cracking, more flexibility. But for most rentals, PVC’s been fine if you keep up with maintenance. The peace of mind with HDPE is nice, but the price tag stings. Sometimes I wonder if tenants even notice the difference unless there’s a problem.


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sparker26
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The peace of mind with HDPE is nice, but the price tag stings. Sometimes I wonder if tenants even notice the difference unless there’s a problem.

You're spot on about HDPE being more forgiving when roots are involved. I've had to snake out PVC lines more than once after a big rain, but HDPE just seems to bounce back. Still, for rentals, I tend to agree—if you stay on top of things, PVC holds up well enough and won’t break the bank. Most tenants probably won’t care unless there’s a backup or leak, and by then, you’re dealing with bigger headaches anyway. Your approach makes sense—no shame in balancing cost with practicality.


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anthonystar371
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I had the same debate when I swapped out some old lines in my last place. Ended up going with PVC just because of the cost, and honestly, it’s held up fine so far—even after a couple of wild storms. Not sure tenants ever notice unless something goes wrong, like you said. HDPE does seem bulletproof, but for rentals, I’m not convinced the upgrade is worth it unless you’re dealing with crazy roots or shifting soil. Maybe if I was living there myself...


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Funny timing—just last year, I got roped into helping my cousin retrofit his place with a greywater system. He was all gung-ho about saving water, but I kept picturing the mess if something went sideways. We ended up running new lines for the showers and toilets, and he wanted to go cheap with PVC too. I’ll admit, it’s tempting when you’re staring at the price tags in the plumbing aisle.

But here’s the thing: I’ve seen what happens when tree roots get ambitious. My neighbor’s yard turned into a swamp after a root cracked his PVC drain line. Took forever to find the leak because it was under a slab, and by the time they did, the repair bill was ugly. Ever since then, I’m a little paranoid about anything that might shift or flex underground. HDPE is pricier, yeah, but it’s like the cockroach of piping—tough to kill.

That said, for rentals? I get why folks stick with PVC. If you’re not dealing with monster roots or shifting clay soil, it usually does the trick. Tenants rarely notice unless there’s a backup or weird smell coming from somewhere it shouldn’t. Still, every time there’s a big storm or freeze, I find myself crossing my fingers and hoping nothing cracks.

I guess it comes down to how much you want to gamble on “good enough.” For my own place, I’d probably pony up for HDPE just for peace of mind (and fewer late-night emergencies). But if you’re managing a bunch of units and watching costs...well, sometimes you just have to pick your battles.

Anyway, hats off to anyone brave enough to try these city water-saving setups. They sound great on paper until you’re ankle-deep in mystery water trying to figure out which valve does what...


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sthompson94
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Yeah, I hear you on the PVC vs. HDPE debate. It’s easy to get sucked in by the lower price tags, but once you’ve seen a root invasion or a pipe split after a freeze, you start thinking long-term. I’ve had to dig up a section of PVC that got crushed under a driveway—total pain, and it made me rethink what “good enough” really means.

One thing I’d add for anyone messing with greywater setups: label every valve and junction as you go. Seriously, it’s a lifesaver when you’re troubleshooting later, especially if you’re not the only one who’ll be working on it. Also, make sure you’ve got proper backflow prevention—city inspectors can be sticklers about that, and you don’t want greywater ending up where it shouldn’t.

If you’re running lines near trees, maybe spend the extra for HDPE just in those spots. No shame in mixing materials if it saves you headaches down the line. And yeah, those “mystery water” moments are real... nothing like standing there with a flashlight, trying to remember which lever shuts off what.


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