Apec Water ROES-100 Filtration System Review
Our verdict
The ROES-100 is Apec Water's 100 GPD step-up from their popular 75 GPD ROES-PH75, offering a faster production rate at essentially the same price. It is a reasonable choice for larger households where the 75 GPD baseline feels limiting.
Check price on AmazonBest for
Households of three or more that have found entry-level 75 GPD RO systems too slow to keep up with daily water demand.
Skip if
You want a certified system with published contaminant reduction data, or you need a tankless design to conserve cabinet space.
- Purification Reverse Osmosis
- Capacity / life 100 G/Day
- Install Under-Sink
- Material Polypropylene
- Dimensions 16 X 5.25 X 17.5 In
- Priced 22% below the category median ($307.99 across 65 tracked models)
Our scorecard
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Owner rating4.3/5
4.3 average across 301 owner ratings
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Popularity2.6/5
301 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-100 is a five-stage reverse osmosis filtration system with a rated production of 100 gallons per day. It uses RO membrane technology as its primary purification stage. The housing material is listed as polypropylene, which is a common construction choice for residential under-sink RO units. The system measures 16 x 5.25 x 17.5 inches and installs under the sink in a traditional tank-based configuration.
At $239.95, the ROES-100 sits squarely in the mid-market for under-sink RO systems. Apec Water is a long-standing domestic brand with a reputation for well-supported multi-stage systems and available replacement filters. No certification data is listed in the product record on file, so buyers who require documented NSF/ANSI reduction numbers should verify that directly with Apec or through retailer spec sheets.
With 301 reviews at 4.3 stars and roughly 100 units sold monthly, this is a modestly reviewed but actively sold product. The rating sits slightly below the Apec ROES-PH75 which has accumulated over 4,000 reviews, suggesting the ROES-100 is the newer or less-promoted sibling in the lineup.
Pros
- 100 GPD production rate is 33% higher than the standard 75 GPD entry-level RO
- Polypropylene housing is lightweight and corrosion-resistant
- Apec Water has a proven track record and good domestic filter support
- Competitive price at $239.95 for a 100 GPD system
- Under-sink install keeps the kitchen countertop clear
Cons
- Only 301 reviews compared to 4,000+ for the related ROES-PH75 model
- No certification data listed in the available product record
- Traditional tank-based design takes up more under-cabinet space than tankless alternatives
- Weight not listed, making it harder to plan the install
Specifications
| Purification | Reverse Osmosis |
|---|---|
| Capacity / life | 100 G/Day |
| Install | Under-Sink |
| Material | Polypropylene |
| Dimensions | 16 X 5.25 X 17.5 In |
Performance notes
Purification method is reverse osmosis. Rated output is 100 gallons per day. Install type is under-sink. Housing material is polypropylene. Dimensions are 16 x 5.25 x 17.5 inches. Weight is not listed in the data on file. No certification field is populated; contaminant reduction claims cannot be confirmed from facts available. For certified alternatives, compare with models that carry documented NSF/ANSI 58 listings.
What buyers say
A 4.3-star average across 301 reviews reflects a generally positive but not exceptional consensus. About 100 units sell monthly, suggesting the product has a real user base rather than being a paper listing. The rating is slightly lower than Apec's flagship ROES-PH75, which may reflect early adopter roughness or differences in customer expectation at the 100 GPD tier.
More from Apec Water
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Frequently asked questions
How is the ROES-100 different from the Apec ROES-PH75?
The primary difference is the rated daily output. The ROES-100 is designed to produce 100 gallons per day versus 75 GPD for the ROES-PH75. Both are polypropylene under-sink RO systems from Apec Water at similar price points. The PH75 adds an alkaline remineralization stage in its model designation; check the current product listing to confirm which stages each model includes.
Is the ROES-100 NSF certified?
The product record we have on file does not include a certification value. We cannot confirm NSF/ANSI certification from the data available. Apec Water has historically obtained certifications on some models, so verify directly with Apec or check the product page for current documentation before purchasing if certification matters to you.
Do I need a separate storage tank with the ROES-100?
Traditional multi-stage RO systems like the ROES-100 typically use a pressurized storage tank that sits alongside the filter housings under the sink. The product record does not specify whether the tank is included, so confirm with the seller whether a storage tank ships with the unit or needs to be purchased separately.