iSpring F3WGB32BKS 4.5" x 20" 3-Stage Whole-House Filter Set — A Year of Water for a Family of Four, $268.48 CAD (11% Off)

Amazon.ca has the iSpring F3WGB32BKS 4.5" x 20" three-stage whole-house filter set at $268.48 CAD, down from $301.99 — 11% off. Prime members ship free; otherwise free shipping starts at $35.

If you already run a whole-house system, only two things matter: does it fit the housings, and how often do you have to do this again.

Three cartridges here. Stage one is a polypropylene sediment filter catching particles down to 5 microns — sand, rust, silt. Stages two and three are coconut-shell carbon block (CTO), which handles chlorine, taste, odour, lead, mercury and other heavy metals. All three are standard 20" x 4.5", so they drop straight into iSpring WGB32B / WHO32B housings and any other system using that size.

Rated at 100,000 gallons per cartridge, or up to 12 months — roughly one change a year for a family of four. Peak flow is 15 GPM, so two showers at once won't noticeably drop pressure. Each cartridge is individually sealed; unwrap before installing.

One thing worth being clear about: this set does not reduce TDS. It leaves the minerals in your water while removing chlorine, heavy metals and odour. If you want purified/RO water, that's a different system — don't buy this one expecting it.

4.8 stars, 95 reviews — a small sample, but almost all five stars. One owner is three years in and now changes them every nine months, drinking straight from the tap. Another compared before and after with the bypass valve open and said the difference is noticeable.

$301.99 is the standing list price; $268.48 is the usual low for this set, which isn't much for a full year of filtration.

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