APEC Water Ultimate RO-90 Reverse Osmosis System [90 GPD]

After checking the best APEC’s reverse osmosis systems in the essence series, we look at the top models within the ultimate series and our first pick is none other than the APEC RO-90 model.

The models in the APEC ultimate series are all WQA gold seal certified systems which means they guarantee the highest standards and contaminant removal rates in the industry.

Besides the certification, what puts them ahead of the essence series models are there high-performance filters and larger capacity.

As one of the flagship system in the ultimate series, the RO-90 provides great performance and results with about twice the amount of purified water that you would get with any standard reverse osmosis unit. It’s a serious consideration for large families with a high demand for water.

Filtration Process

The filtration process of the APEC RO-90 system involves 5 stages featuring super-effective filters and membrane.

Composed of a quality polypropylene sediment filter, the 1st stage of the system removes particles in the water like rust, dust, sand and silt down to 5 microns. The 10” filter has a large dirt holding capacity which makes it more durable and efficient in filtering out the sediments.

The 2nd stage is fitted with also a quality 5-micron carbon block filter that can remove chlorine, chloramines, VOCs, unpleasant odor, taste, color and most other chemicals present in the water.

Another similar 5-micron carbon block filter sits in the 3rd stage and it takes care of the remaining chlorine, VOCs and chemicals that passed through the second stage.

The two carbon block filters have particles of carbon made of coconut shell and fused into a homogeneous region. Their large surface area and effective coconut shell carbon media ensure optimum contact time which boosts their absorption ability.

Stage four features APEC’s high-rejection 0.0001-micron FILMTEC RO membrane which performs rigorous filtration that eliminates even the tiniest contaminant molecules in the water.

Certified by the WQA, this high-quality membrane will filter out up to 99% of all TDS and contaminants including bacteria, viruses, heavy metals, fluoride and much more.

In removing the residual taste that often arises from the RO holding tank, the APEC RO-90 is equipped with an advanced coconut shell TCR (Total Contamination Removal) filter. This post-filter refines the RO water eliminating every remaining taste and odor from the tank.

Filtration Capacity and Efficiency

While the superb performance of the RO-90 is commendable, its high water production capacity is as well a major factor that has made it an attractive option on the market.

The unit can generate up to 90 gallons of purified water in a day which is amongst the biggest capacities available for residential under sink RO systems.

This great capability to produce a lot of water make this model absolutely perfect for any large household and family that often consume more than 50 gallons per day.

Moreover, the high capacity filters help facilitate a much faster flow rate and filtration, about twice faster than standard RO systems. Therefore, you will be able to draw much more water from the unit within a shorter time. It’s ideal for filling those large pitchers.

The only downside though is that like most of the other systems from APEC, this system is set to use 3 gallons of water to rinse out the contaminants for every one gallon of pure water produced. So, there’s no improvement with regard to filtration efficiency.

Installation and Maintenance

You won’t need to seek professional help to install the unit. It requires just basic DIY skills, but even if you are not that handy, it really won’t be an issue because it comes with JG quick connect fitting which allows for easy tubing connection.

The installation manual is comprehensive and straightforward with everything you need to set it up included in the package.

However, the filters in housing may be somewhat difficult to replace compared to the modular filters. The good thing though is that they are super durable which means fewer change-outs.

The stages 1 to 3 prefilters need changing just one a year and the membrane and the post-carbon filter will go for 3 to 5 years before requiring replacement.

For anyone looking for high quality and a high output coupled with the lowest maintenance possible, the APEC RO-90 is a unit worth considering. It’s ideal for situations where the demand for filtered water is higher than average.


  • High-performance filters clear all contaminants
  • Larger water filtration capacity of up to 90 GPD
  • High capacity filters ensure a faster flow rate
  • Simple and quick to install with everything included
  • Easy to maintain with long-lasting quality filters
  • Backed by 1-year limited warranty


  • Produces slightly more wastewater than average
  • Filters and membrane houses are a bit hard to open

Read moreAPEC Water Ultimate RO-90 Reverse Osmosis System [90 GPD]

APEC Water RO-Hi Reverse Osmosis System [90 GPD]

The RO-Hi is yet another fine model in APEC’s ultimate line of reverse osmosis filtration systems.

This premium WQA gold seal certified system is a perfect fit for those searching for a fast-flow system with a high output. It’s purposely tailored for high usage or fast-flow output.

Filtration Process

The RO-Hi is equipped with premium-quality filters that deliver high performance for an extra-long time compared to those in other standard systems. The unit uses a 5-stage filtration process to get rid of all kinds of impurities and contaminants in the source water.

In the 1st stage, there’s a polypropylene sediment filter which takes out all the particles and large particles in the water down to 5 microns. This step clears out all the dust, rust, silt, sand, scales and any other solid contaminant. 

The 2nd and 3rd stages consist of effective coconut shell carbon block filters with a large surface area. They absorb up to 99% of chlorine and chloramines that often lead to unpleasant tastes, odor, colors and cloudiness. These filters also efficiently remove most of the common chemicals and VOCs from the water.

At the 4th stage, a FILMTEC high rejection TFC reverse osmosis membrane gets rid of even the tiniest remaining contaminant in the water including 99% of all the TDS (total dissolved solids).

It clears out everything larger than 0.0001 microns which pretty much doesn’t much around other than pure water molecules.

The final stage of the unit is an advanced coconut shell carbon filter which ensures the water you draw from your faucet does not have any unpleasant taste from the holding tank.

Filtration Capacity and Efficiency

With an output of 90 gallons of purified water per day, the RO-Hi is another model within APEC’s ultimate series that will comfortably suit any large family out there that requires a high amount of water regularly.

Besides that, what makes this model one of the best on the market in terms of performance is that it has a fast-flow output design.

It features 3/8” output quick dispense design which increases the water flow rate allowing it to fit the tank twice faster than standard reverse osmosis systems.

This will reduce waiting time, especially when filling large pots or pitchers. You will be able to use it often without lacking clean drinking water.

With regards to the amount of wastewater generated, the RO-Hi is still not that efficient and this is something we’ve noted in most of APEC’s RO systems. It wastes 3 gallons of water for every gallon of purified water produced.

Installation and Maintenance

There’s nothing complicated when it comes to setting up the RO-Hi. Everything you need is included in the package plus the installation tools and manual.

It will as well require very little maintenance because it has longer-lasting filters. The three first filters can last up to 12 months while the post-filter and the membrane have a service life of 3 to 5 years.

Overall, we would say this system is best suited for larger households that have five or more members. It’s built specifically for high usage and will ensure you get a constant supply of water to meet your needs.


  • Reduces contaminants to close to zero
  • High capacity filters with a high flow rate
  • High pure water production ideal for large families
  • Easy to install and filters have a longer service life
  • Backed by a 2-year limited warranty


  • Wastewater generated is a little on the high end

Read moreAPEC Water RO-Hi Reverse Osmosis System [90 GPD]