APEC Water SystemsRO-PH90 Ultimate Alkaline 6-Stage 90 GPD Reverse Osmosis System
Adds a calcium carbonate remineralisation stage to the RO-90 chassis for 145 dollars more.
$410
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Usability
Usability
The RO-PH90 exists for buyers who find straight RO permeate flat, and the remineralisation cartridge is the entire difference between it and the RO-90. Its strongest attribute is the same 90 GPD membrane and tank pairing that makes the RO-90 work, with a taste profile that owners consistently prefer in side-by-side comparisons. Its weakest is the price: 145 dollars over the RO-90 buys one additional cartridge that then needs replacing on its own schedule. The certification position is unchanged, since the WQA Gold Seal covers NSF/ANSI 58 for TDS reduction and the remineralisation stage is outside any listing. Buyers are paying for palatability rather than for anything measurable, and APEC does not publish a target pH or mineral concentration for the added stage.
- Sixth stage adds calcium carbonate for a fuller taste than straight RO permeate
- WQA Gold Seal certification to NSF/ANSI 58
- 90 GPD output into a four-gallon pressurised tank
- Same serviceable cartridge layout as the rest of the Ultimate line
- Assembled in California with lifetime technical support
- Costs 145 dollars more than the RO-90 for one additional cartridge
- APEC publishes no target pH or mineral concentration for the alkaline stage
- Certified scope is TDS reduction only, not the contaminant list in the copy
- Warranty is one year unless registered within eight weeks
- Sixth cartridge adds another consumable to the replacement schedule
The APEC Water Systems RO-PH90 is the RO-90 with a sixth calcium carbonate remineralisation stage fitted after the membrane, raising pH and returning mineral content to the permeate. Output is 90 gallons per day into a four-gallon pressurised tank. APEC holds a WQA Gold Seal on this model certifying it to NSF/ANSI 58. A UV variant of the same chassis is sold separately.
Additional information
Specification: APEC Water Systems RO-PH90 Ultimate Alkaline 6-Stage 90 GPD Reverse Osmosis System
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Questions answered from our data
How much does a reverse osmosis system cost?The 69 reverse osmosis systems we list run from $165 to $3,779, with a median of $367.
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