WaterAnywhere Direct Flow, RO-DF600 vs Filter United VIVA21 6-Stage Alkaline Remineralization RO System (V21RS6S01PH)
Specs, prices, editor verdict, and who should buy which, compared side by side.
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WaterAnywhere Direct Flow, RO-DF600 (mid, $578.8) vs Filter United VIVA21 6-Stage Alkaline Remineralization RO System (V21RS6S01PH) (entry, $249.99). Different tools for different jobs (see the per-product details below).
Compared on 0 shared specs · same category (environment).
We have not scored these two head to head, so this page does not name a winner. The Filter United VIVA21 6-Stage Alkaline Remineralization RO System (V21RS6S01PH) starts at $249.99 and the WaterAnywhere Direct Flow, RO-DF600 at $578.8. The per-buyer recommendations below say who each one suits.
Who should buy which
Kitchens on municipal water with an outlet and a drain under the sink, room for a cabinet 16.5 in high and 17.5 in long, and an owner who wants reverse osmosis at the tap without a storage tank.
You want an NSF listed system or a published contaminant test report; your supply is of unknown quality, which the manual says needs disinfection before or after the system; you want a filter life indicator, TDS display or leak shut off, none of which AMI describes; or you need longer than the store's three month warranty.
Homeowners on municipal water who want reverse osmosis plus remineralization at the kitchen tap for under $250, have cabinet space for the unit and a 4-gallon tank, and accept a brand-stated certification in place of a verified one.
You treat published third-party certification and per-contaminant test data as your first filter, you rent or cannot plumb an under-sink unit with a drain connection, or your line pressure falls outside the 40 to 80 psi window the system requires.
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Frequently asked
Which is better, the WaterAnywhere Direct Flow, RO-DF600 or the Filter United VIVA21 6-Stage Alkaline Remineralization RO System (V21RS6S01PH)?
We have not scored these two head to head, so this page does not name a winner. The Filter United VIVA21 6-Stage Alkaline Remineralization RO System (V21RS6S01PH) starts at $249.99 and the WaterAnywhere Direct Flow, RO-DF600 at $578.8. The per-buyer recommendations below say who each one suits.
How much do they cost?
WaterAnywhere Direct Flow, RO-DF600: $578.8. Filter United VIVA21 6-Stage Alkaline Remineralization RO System (V21RS6S01PH): $249.99. Prices are verified against the manufacturer; check the live links for current pricing.
Who should buy which one?
WaterAnywhere Direct Flow, RO-DF600: Kitchens on municipal water with an outlet and a drain under the sink, room for a cabinet 16.5 in high and 17.5 in long, and an owner who wants reverse osmosis at the tap without a storage tank. Filter United VIVA21 6-Stage Alkaline Remineralization RO System (V21RS6S01PH): Homeowners on municipal water who want reverse osmosis plus remineralization at the kitchen tap for under $250, have cabinet space for the unit and a 4-gallon tank, and accept a brand-stated certification in place of a verified one.
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