Apec Water ROES-PH75 Filtration System Review
Our verdict
The Apec Water ROES-PH75 combines a standard 75-gallon-per-day RO system with an alkaline remineralization stage, giving buyers both filtration and mineral replenishment in one package at $239.99. Its 4,000-plus reviews make it one of the most extensively reviewed RO systems in this category.
Check price on AmazonBest for
Buyers who want RO-quality water but prefer to add minerals back in, and who want a system with a proven track record backed by a large review base.
Skip if
You do not need an alkaline stage and want to keep ongoing filter costs simpler, or if you have very limited under-sink cabinet depth.
- Purification Reverse Osmosis
- Capacity / life 75 G/Day
- Install Under-Sink
- Material Polypropylene
- Dimensions 15.5 X 5.25 X 17.5 In
- Weight 1.41 lb
- Priced 22% below the category median ($307.99 across 65 tracked models)
- Weight of 1.41 lb - lighter than 94% of the 65 models we track
Our scorecard
-
Owner rating4.6/5
4.6 average across 4,000 owner ratings
-
Popularity4.9/5
4,000 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other water filtration: replacement filters, under-sink and reverse osmosis systems, filter pitchers, water dispensers, coolers, faucet filters and softeners we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
The Apec Water ROES-PH75 is an under-sink reverse osmosis system that adds a sixth-stage alkaline remineralization filter to the typical 5-stage RO design. This extra stage is designed to add beneficial minerals back to water after it passes through the RO membrane, which strips most dissolved solids. The polypropylene housing measures 15.5 x 5.25 x 17.5 inches and weighs just 1.41 pounds for the system itself, excluding any storage tank.
With 4,000-plus reviews at a 4.6-star rating, the ROES-PH75 sits among the most bought-and-reviewed RO systems on Amazon. That scale of buyer feedback gives a meaningful signal: most people who purchase and install it are satisfied. The $239.99 price is competitive for a 6-stage RO configuration.
No third-party certification was confirmed in the product data. Apec Water does market other systems with NSF component certifications, so prospective buyers should confirm the current certification status of the ROES-PH75 directly with Apec or on the current product listing.
Pros
- Over 4,000 reviews at 4.6 stars, one of the strongest review records in its price tier
- Alkaline remineralization stage adds minerals back post-RO
- Competitive pricing at $239.99 for a 6-stage configuration
- Under-sink install keeps counters clear
- 75 GPD capacity suits most household needs
Cons
- Alkaline filter cartridge adds to ongoing replacement costs versus 5-stage systems
- No confirmed certification data in product facts
- Polypropylene housing is standard, not brass or premium material
- Requires under-sink cabinet space at 15.5 x 5.25 x 17.5 inches plus tank
Specifications
| Purification | Reverse Osmosis |
|---|---|
| Capacity / life | 75 G/Day |
| Install | Under-Sink |
| Material | Polypropylene |
| Dimensions | 15.5 X 5.25 X 17.5 In |
| Weight | 1.41 lb |
Performance notes
Reverse osmosis is designed to reduce a broad range of dissolved contaminants including certain heavy metals, fluoride, chlorine, nitrates, and dissolved solids generally. The ROES-PH75 adds a calcite or similar alkaline media stage after the RO membrane, intended to restore minerals such as calcium and magnesium that RO removes. The 75-GPD rating reflects daily production capacity under standard inlet pressure conditions, not instantaneous flow. The system requires a storage tank for on-demand delivery. The 1.41-pound unit weight is for the filter assembly only.
What buyers say
With more than 4,000 reviews and a 4.6-star average, buyer sentiment is solidly positive. The large sample size means the rating reflects a broad, real-world cross-section of users rather than a small early adopter group. Common themes in well-reviewed RO systems of this type include improved water taste and reliable performance over time.
More from Apec Water
Similar water filtration: replacement filters, under-sink and reverse osmosis systems, filter pitchers, water dispensers, coolers, faucet filters and softeners to consider
Featured in
Frequently asked questions
What does the alkaline stage on the ROES-PH75 actually do?
The alkaline stage is designed to add minerals, typically calcium and magnesium, back into the water after it passes through the RO membrane. Standard RO removes most dissolved solids including beneficial minerals. The remineralization stage partially restores mineral content and may raise pH slightly. The extent of mineral restoration depends on water contact time and filter saturation.
How often do filters need replacing on the ROES-PH75?
Apec typically recommends annual replacement for pre-filter stages and the alkaline stage, with the RO membrane lasting 2 to 3 years under normal conditions. Actual replacement frequency depends on your local water quality and household usage volume. Check Apec's current filter replacement schedule for exact guidance.
Does the ROES-PH75 require professional installation?
Apec designs its under-sink systems for DIY installation and includes instructions and fittings. Most homeowners with basic plumbing comfort can install it in a few hours. If you are unfamiliar with under-sink plumbing connections or need to add a separate faucet, a plumber can handle it quickly.