
APEC RO-PH90
Score: 88/100
Purewell PW-OB-PH
Score: 72/100Rankings

The APEC RO-PH90 is a 6-stage alkaline reverse osmosis system designed to remove up to 99% of contaminants while remineralizing water to improve taste. It features a pH+ remineralization stage that adds minerals back into the filtered water, addressing the flat taste common in standard RO systems. Best suited for households seeking to eliminate bottled water consumption while improving tap water quality with better-tasting water for beverages.

The Purewell 6-Stage system offers high-precision 0.01-micron filtration in a durable stainless steel body, making it excellent for removing microscopic contaminants. However, it lacks TDS reduction capabilities and has a limited water capacity. It is best suited for small households or off-grid use where fine filtration is prioritized over mineral adjustment.
| Attribute | ![]() | ![]() |
|---|---|---|
0.9 GPM | 4 GPMbest | |
12 monthsbest | 6 months | |
6 stagesbest | 6 stagesbest | |
99 %best | — | |
| ↓ lower better | 0 PSIbest | — |
| ↓ lower better | — | 0.01 micronsbest |
| ↓ lower better | 3 ratiobest | — |
2 yearsbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Health & Safety(1) | ||
Certifications | WQA Certified | NSF/ANSI 42, 372 |
Installation & Compatibility(1) | ||
Installation Type | Under Sink | Countertop / Gravity |
Filtration & Performance(3) | ||
Filtration Technology | Reverse Osmosis | Ultra-Filtration (UF) and Carbon |
Flow Rate (GPM) | 0.9 GPM | 4.0 GPM |
Micron Rating (microns) | microns | 0.01 microns |
Maintenance & Warranty(1) | ||
Filter Lifespan (months) | 12 months | 6 months |
Dimensions & Build(3) | ||
Height (inches) | 18.0 inches | 20.0 inches |
Width (inches) | 7.0 inches | 8.8 inches |
Depth (inches) | 15.0 inches | 8.8 inches |


Products in the top-left offer the best value (high score, low price).

Professional reviewers highlight the APEC RO-PH90 as a robust, professional-grade solution for households seeking high-quality water purification. The six-stage system is praised for its ability to remove over 1,000 impurities while the pH+ remineralization stage successfully addresses the common complaint of flat-tasting RO water.
Everyday users generally express high satisfaction with the taste and clarity of the water produced by the APEC system. Common praise includes the improvement in flavor for beverages like coffee and tea, as well as the cost savings from eliminating bottled water purchases.

Professional reviews highlight the Purewell system as a well-crafted solution for fine filtration needs, praising its 0.01-micron accuracy and durable construction, while noting the inability to reduce TDS.
Users appreciate the ease of use, portability, and effective contaminant removal, though some note the slower flow rate and limited capacity as minor inconveniences.
“strips out over 1,000 impurities”

“keeps up with family needs effortlessly”

“installation as straightforward with minimal maintenance”


