Apec Water RO-Hi Filtration System
- Filtration System
- 90 gallons
- Reverse Osmosis
- Under-Sink
- Better rated than 95%
An under-sink RO system with a 90-gallon capacity rating, aimed at buyers who want higher throughput and are prepared to install it permanently.
As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.
How it ranks among the 65 filtration systems we track
5.0★ across 1 Amazon ratings, Bayesian-smoothed toward the category average.
1 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 65 filtration systems we track - how the scorecard works · full filtration systems data report. Confidence: limited - limited rating history.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
An under-sink reverse osmosis system from Apec Water rated for 90 gallons of output, built with a polypropylene housing measuring about 6 by 16 by 18 inches. It is designed to mount below the kitchen sink and supply a separate drinking faucet.
The 90-gallon rating is a higher output figure than many comparable under-sink RO units, pointing to a larger membrane or multi-stage cartridge setup, though the listing does not break down the number of filtration stages. Reverse osmosis systems like this remove a broader range of dissolved contaminants than a simple carbon filter, at the cost of a permanent install.
- Reverse osmosis purification
- 90-gallon rated capacity
- Under-sink install
- Polypropylene housing, about 6 x 16 x 18 in
Who it's for
Homeowners ready to install an under-sink RO system and who want a higher output rating than an entry-level unit. Not for renters or anyone wanting a countertop, no-install filter.
Strengths and trade-offs
Drawn from this product's published specifications.
- Reverse osmosis with a 90-gallon rated capacity
- Compact under-sink footprint
- Requires permanent under-sink installation
- Number of filtration stages not listed
Performance notes
Reverse osmosis pushes water through a membrane to filter out dissolved solids, and the 90-gallon rating here suggests the system is built for steady household use rather than light or occasional filtering. The polypropylene housing keeps the unit lighter than metal alternatives while still fitting the tight space under a sink.
Specifications
| Brand | Apec Water |
|---|---|
| Capacity | 90 gallons |
| Purification | Reverse Osmosis |
| Install Type | Under-Sink |
| Material | Polypropylene |
| Dimensions | 6 × 16 × 18 inches |
Other Apec Water filtration systems
How it compares
This product against the closest alternatives we track in filtration systems.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Apec Water RO-Hi Filtration SystemThis product | 5.0 / 5 | 1 | 2.7 / 5 |
| Waterdrop WD-TSU Filtration SystemWaterdrop | 4.5 / 5 | 3,347 | 4.4 / 5 |
| Aqua Crest AQ-5KDC Filtration SystemAqua Crest | 4.4 / 5 | 1,300 | 4.3 / 5 |
| iSpring RO500AK-BN Filtration SystemiSpring | 4.7 / 5 | 562 | 4.2 / 5 |
| Bluevua A-JSJ-LPD-100UV-BMT Filtration SystemBluevua | 4.4 / 5 | 1,356 | 4.0 / 5 |
Similar filtration systems from other brands
Questions about the Apec Water filtration systems
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What capacity is the Apec Water RO-Hi rated for?
It is rated for 90 gallons of output.
Does the RO-Hi install under the sink?
Yes, it is built for under-sink installation and feeds a separate faucet.
What is the RO-Hi housing made of?
It uses a polypropylene housing rather than metal.