APEC Water Systems RO-90 Ultimate Series Review

In Brief: Review of APEC RO-90 Ultimate Series

APEC Water Systems are known for being quality products that are relatively within budgets. The RO-90 Ultimate Series brings this level of quality to a high capacity of 90 gallons per day. It improves your water supply’s taste, smell, and healthiness, making it fit for consumption.

APEC, or Advanced Purification Engineering Corporation, is an American company that manufactures water filtration systems. It was founded in 2002 and is headquartered in City of Industry, California.

The APEC Water Systems RO-90 Ultimate Series is a premium water filtration system. It purifies water using a vigorous five-staged process. The water is made free of up to 99% of contaminants.

Key Specifications of APEC Water Systems RO-90 Ultimate Series

APEC Water Systems RO-90 Ultimate Series Top Tier Supreme Certified High Output 90 GPD Ultra Safe Reverse Osmosis Drinking Water Filter System, Chrome Faucet The APEC RO-90 Ultimate Series is a premium quality system built using only certified components. It has been certified with a WQA gold seal to remove up to 99% of contaminants in water.

This filtration system has a production capacity of 90 gallons per day. It features a Dow Filmtec membrane with high flow filters and tubing. These allow for a high output rate that almost eliminates wait time.

There are large super capacity solid block filters that last twice as long as regular filters do. The solid metal-framed construction prevents kinks and leaks in tubing damage.

This structure also helps the system function without vibrations or noise. The design experience is simple and organized. The filter replacement procedure is intuitive and convenient.

It features an automatic shutoff and an option of a low rinse water ratio that makes it an eco-friendly product. All RO-90 models come with a designer, lead-free faucet with chrome finish.

This package includes:

  • filter set
  • system head
  • filter housings
  • color-coded tubing
  • 4 Gal. storage tank
  • luxury designer faucet
  • installation kit
  • detailed owner’s manual

Here is the lost list of specs –

Contaminants filteredLead,Chlorine
Fluoride, bacteria
Lead reduction96%
Chlorine reduction100%
Copper reduction99%
Iron reduction95%
Fluoride reduction97.70%
Bacteria reduction99%
FeaturesAutomatic shutoff
Minimum feed water pressure40 PSI
Maximum feed water pressure80 PSI
Minimum feed water temperature40 deg F
Maximum feed water temperature100 deg F
Fitting styleQuick Connect
Number of stages5
Weight28 lbs
Dimensions18"Hx 16"W x 5.25"D

To learn more through a user review, watch this video:


What Impurities it removes and Benefits

The APEC Water Systems RO-90 Ultimate Series has a 5-stage procedure. This powerful filtration process gets rid of chlorine, lead, chromium, fluoride, arsenic, taste, and odor.

The first stage is a high capacity polypropylene sediment filter. Its job is to filter out dust, dirt, rust, and particulate matter from the source water. This pre-filter extends the life of the RO membrane.

The next two stages consist of premium extruded carbon blocks. They remove VOC and common chemicals found in water. It also takes care of any remaining chlorine taste or smell, and cloudiness.

The fourth stage is made of a FILMTEC (DOW Chemical) High Rejection TFc Reverse Osmosis Membrane. It eliminates up to 99% of all Total Dissolved Solids, heavy metals, and pathogens.

The final stage is an advanced coconut shell refining carbon. This Total Contamination Removal filter takes away any residual taste in your drinking water.

How to assemble / Install APEC Water Systems RO-90 Ultimate Series

All the information that you need for installation is explained in detail in the owner’s manual. The document is divided into four sections: Installation, Maintenance, RO Basics, and Troubleshooting.

There are two additional sections for more information and warranty details. The installation is fairly straightforward and can be followed through the manual.

Step by step instructions tell you how to prepare, assemble, connect, and mount the individual components. Labeled diagrams help you identify them.

Warranty / Repairs

The APEC Water Systems RO-90 Ultimate Series comes with a limited one-year warranty. In case of any defects within this warranty period, APEC will cover the cost of repair or replacement.

If there is a manufacturing defect found during this limited period, APEC will give a full refund. To learn more about the warranty policy, refer to page 38 of the manual.

Customer Review Analysis

We did an extensive analysis of several e-commerce websites and online forums to try and gauge how customers feel about the APEC Ultimate Series.

Buyers have given very high ratings in their reviews. Out of more than a thousand reviews, 82% have given five stars. Only 8% of reviews have low ratings.

The treated water is free of all tastes and smells and is fit for drinking. The system body is compact and fits well even in small spaces.

Though the price is slightly on the higher side, users think it’s worth it. The amount of features that come with it make it great value for money.

Reviews have also praised its durability as it works well even after the warranty period is over. We barely found any negative comments, which makes it safe to say this filter is a good choice.


Pros/Cons of APEC Water Systems RO-90 Ultimate Series

After going through several consumer reports and expert comments, we concluded with the following pros and cons of this water filter:


  • 90 GPD capacity
  • Removes 99% contaminants
  • Relatively inexpensive filters
  • Manufactured in the USA
  • Easy installation
  • 4-gallon capacity storage tank
  • Long RO membrane life


  • Filters aren’t as easy to change as in modular designs
  • 3:1 wastewater ratio


Recommended accessories with APEC Water Systems RO-90 Ultimate Series

APEC RO-90 Ultimate Series Replacement Filters

APEC Water Systems Filter-Set US Made Double Capacity Replacement Stage 1-3 for Ultimate Series Reverse Osmosis System, Standard , White

APEC Water Systems ICEMAKER-KIT-RO-1-4 I

APEC Water Systems ICEMAKER-KIT-RO-1-4 Ice Maker Installation Kit For Standard 1/4" Output Reverse Osmosis Systems, Refrigerator and Water Filters



How big a hole does the faucet need?

The faucet requires a hole sized 5/8th of an inch.

Does it need an electrical outlet?

No, it doesn’t. The RO-90 Ultimate Series runs simply on incoming water pressure between 40-80 PSI.

Does this neutralize alkaline water?

The system is designed to remove 99% of contaminants. This may cause a decrease in pH but the system is not specifically designed to neutralize the water.

Does this remove radon?

The carbon filtration and RO membrane can help reduce radon in a water source.

Does this system use an air gap faucet?

All APEC products use non-air-gap faucets but if you contact customer service, they can upgrade your faucet for a small cost.

Our Recommendation

The APEC Water Systems RO-90 Ultimate Series is a high-grade water purification system. It is ideal for medium to large homes with a high capacity of 90 gallons per day.

The purified water is free of almost all contaminants, flavors, and odors. This gives you better tasting tea, coffee, and food when used in cooking. The superior quality also reflects the longevity of the system.

We recommend buying this model if you’re looking for a top-quality water filtration system with inexpensive maintenance.

Last update on 2022-09-26 / Affiliate links / Images from Amazon Product Advertising API

Mary Brown
About Mary Brown

Mary, a mother of 2, is an experienced writer and has written extensively on topics related to home and garden. She loves cooking and baking and plans to start her food blog soon.

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