Boroux Legacy Gravity Filter System vs RKIN U1-W 4-in-1 Countertop RO
Specs, prices, editor verdict, and who should buy which - compared side-by-side.
Boroux Legacy Gravity Filter System (premium, $355–$455) vs RKIN U1-W 4-in-1 Countertop RO (premium, $749) - different tools for different jobs (see the per-product details below).
Compared on 2 shared specs · editor scores 8.0 vs 7.8 · same category (environment).
These are close picks. Both score in the same range. The right call depends on buyer profile - read the per-buyer recommendations below.
Side-by-side specs
| Spec | Boroux Legacy Gravity Filter System | RKIN U1-W 4-in-1 Countertop RO |
|---|---|---|
| price | $355–$455 | $749 |
| filters | 2 Foundation filters (brand-rated 12 months) or 4 (24 months) | ~$130/yr bundle; RO membrane every 12-24 months |
| install | None; no plumbing, power, or pressure | None; countertop, fill-tank design (1 gal) |
Boroux Legacy Gravity Filter System also publishes: type, certifications, compatibility, finishes, origin, payment
RKIN U1-W 4-in-1 Countertop RO also publishes: stages, output, dispensing, dimensions, testing, warranty
Who should buy which
Buyers who rank independent certification first, preparedness households that want water with no plumbing or power, and Berkey owners who need compatible replacement elements.
You want RO-level dissolved-solids removal or on-demand flow from a tap, where an undersink system like the $329.45 RKIN Flash is the better tool for the job.
Renters and small households who want true reverse osmosis with hot and cold dispensing and zero plumbing, and who accept brand-stated (unpublished) test results in place of NSF certification.
You want NSF-certified reduction claims (Boroux leads there), you need high-volume water for a large family, or wastewater bothers you (RO discards roughly half of each fill).
Go deeper
Frequently asked
Which is better, the Boroux Legacy Gravity Filter System or the RKIN U1-W 4-in-1 Countertop RO?
They are closely matched on our scoring, so the right pick comes down to your priorities. The verdict and spec table above compare them on price, features, and who each one suits.
How much do they cost?
Boroux Legacy Gravity Filter System: $355 to $455. RKIN U1-W 4-in-1 Countertop RO: $749. Prices are verified against the manufacturer; check the live links for current pricing.
Who should buy which one?
Boroux Legacy Gravity Filter System: Buyers who rank independent certification first, preparedness households that want water with no plumbing or power, and Berkey owners who need compatible replacement elements. RKIN U1-W 4-in-1 Countertop RO: Renters and small households who want true reverse osmosis with hot and cold dispensing and zero plumbing, and who accept brand-stated (unpublished) test results in place of NSF certification.
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