iSpring RO100 5-Stage RO System — 100 GPD, 1:1 Pure-to-Waste! $448.99 CAD (19% Off)

Amazon.ca currently has the iSpring RO100 under-sink 5-stage reverse osmosis system at $448.99 CAD (list $551.64, 19% off). Prime members ship free; otherwise free shipping on orders over $35.

Five stages, rated to remove up to 99% of more than 1,000 contaminants — lead at 98%, plus chlorine, fluoride, arsenic and asbestos. Output is 100 GPD at a 1:1 pure-to-waste ratio. Older RO units often run 1:3 or 1:4, three or four litres down the drain for every litre you drink; 1:1 is about as good as it gets without adding a pump.

The inlet and outlet are 3/8" quick-connects rather than the usual 1/4", so filling a pot isn't a standing-and-waiting job. The faucet is brushed-nickel, all metal, European-styled — which matters more than it sounds, because that faucet is going to be on your counter for a decade.

Filters and membrane are US-made, and the first-stage housing is clear so you can see when it's dirtied up instead of tracking dates. The unit weighs 12.79 kg, so measure your under-sink space before you order.

Installation is DIY: iSpring says a couple of hours, all parts included, tubing pushed half an inch into the quick-fits and locked — no threading, no Teflon tape. If it goes sideways there's a US support team in Georgia, a one-year warranty and lifetime phone help.

4.4 stars over 128 ratings, #526 in under-sink water filters. This category never scores very high because it grades the install and the support as much as the hardware, so read for whether anyone picks up the phone.

Worth it if your tap water tastes off, or you're in an older building where lead is a real question. A system at $448 beats years of bottled water on cost and on hauling cases home. Not an all-time low, but $100 under list.

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