APEC Essence ROES-50 Reverse Osmosis System [50 GPD]

Opening our list is the ROES-50 which is arguably one of APEC’s best and most popular under sink RO systems within the essence series.

Despite being a basic model, the ROES-50 is a very efficient unit offering great contaminant rejection rates and reliable performance at a highly competitive price.

Filtration Process

The APEC Essence ROES-50 uses a 5-stage RO filtering process to effectively purify tap water and make it clean and safe for drinking and cooking.

The 1st stage of the system involves a quality 5-micron sediment filter made from polypropylene. This first filter does well to remove sediments and fine particles in the water which include dust, sand, silt, rust, scale and other large contaminants that are visible to the naked eye.

The sediment filter is followed by APEC’s 5-micron carbon block filter in the 2nd stage which gets rid of chlorine, chloramines, bad taste, odors, colors, VOCs and other chemicals.

The 3rd stage is another 10-micron carbon block designed to further remove any residual chlorine, bad taste, odors, and chemicals. 

These double carbon blocks (in the 2nd and 3rd stage) have extremely large surfaces which maximize contact time making the ROES-50 very efficient in attaining the maximum possible chlorine and chemical removal in tap water.

The 4th stage in the unit features a 0.0001-micron Thin-film Composite (TFC) membrane which has a high contaminant and TDS (total dissolved solids) rejection rate of up to 99%.

This high-quality membrane will remove all kinds of contaminants in the water such as arsenic, chlorine, chromium, bacteria, viruses, lead, toxic fluoride, radium, VOCs and overall TDS.

The last stage features a coconut shell carbon filter and this performs the final polishing by getting rid of any residual taste and odor from the RO storage tank to ensure the water delivered to the faucet is totally free of contaminants, odorless and has a smoother taste.

Filtration Capacity and Efficiency

The ROES-50 system is capable of producing up to 50 gallons of filtered water a day. The rate may, however, vary based on the temperature and pressure of your source water but it will be sufficient for small to medium-sized homes.

Furthermore, the unit comes with a 4-gallon holding tank. It’s slightly larger when compared to similarly priced models and will ensure a steady supply of clean water without long waiting times.

In terms of filtration efficiency, the ROES-50 wastes around 3 gallons of water for every gallon of purified water it produces. This is a little bit above the average 2:1 ratio of most other models but it will not spike your water bills by large a margin.

Installation and Maintenance

Setting up this ROES-50 unit is easy, even without any previous experience. It only requires average DIY skills and everything you need to install is provided including a detailed instruction manual.

All the quick connect fittings feature stainless steel teeth to guarantee firm grip plus the O-rings are of good quality hence will provide a leak-proof seal.

The first three carbon filters require changing every 6 to 12 months depending on the quality of your source water. The RO membrane can be replaced once after 2 to 3 years while the fifth stage filter can last for up to 2 years.

With its great performance, decent filtration capacity and durable filters, the APEC Essence ROES-50 is a superb option if you are looking for a standard RO system and the best part is that it’s very affordable.


  • Removes 99% of contaminants in source water
  • Produces 50 gallons of filtered water per day
  • Large holding tank for a steady supply of water
  • Easy to install with leak-free quick connect fittings
  • Long-lasting filters requiring low maintenance
  • Comes with 1-year limited warranty


  • Produces slightly more wastewater
  • Low source water pressure may affect the filtration capacity

Read moreAPEC Essence ROES-50 Reverse Osmosis System [50 GPD]

iSpring RCC7P 5-Stage Reverse Osmosis System Review

iSpring RCC7P reverse osmosis system is an extended version of the RCC7 with an electric booster pump that ensures reliable, consistent performance regardless of pressure variations. This RO system is ideal for low-pressure water, the booster pump allows the system to achieve tank fill up to 50% faster and 50% less water waste.

If you live in an area where your typical residential water pressure is low, say around 40psi or lower, then this iSpring RCC7P might just be the ideal choice for you.

It’s a high-performance system designed with an inbuilt pump that boosts the feed water pressure high enough to allow the system to perform much effectively.

Filtration Process

Like the RCC7 model, the iSpring RCC7P utilizes a 5-stage RO filtration process which ensures reliable and efficient water purification results.

The three first stages consist of three 5-micron pre-filters that include a polypropylene sediment filter followed by a carbon KDF (GAC) filter and then a carbon block (CTO) filter.

The first two filters trap all sediments, large contaminants, and microorganisms that are bigger than 5 microns including chlorine, chloramines and other chemicals.

Smaller contaminants, chlorine, and microorganisms that pass through the second stage are further removed by the carbon block filter in the third stage.

The fourth stage is a high rejection RO membrane which gets rids of all remaining contaminants that are as small as 0.0001 microns.

It has a rejection rate of 99.99% hence can eliminate more than a thousand harmful pollutants including arsenic, viruses, bacteria, chemicals, lead, pesticides, chlorine, and fluoride.

The final stage is the fine GAC filter that provides the final polishing. It removes any possible residual contaminant and odor that may have accumulated in the RO tank delivering clean and safe purified water to the faucet.

Inbuilt Booster Pump

Now the most commendable thing about this iSpring RCC7P model and what makes it really perform so well is the fact that it’s equipped with an inbuilt booster pump.

The RO filtration process requires high feed pressure so as to force all the impurities out of your water and when it’s low, the system will not be efficient. This is where this booster pump comes into play.

It’s designed to raise the inlet/feed water pressure going into the system from as low as 30 psi to about 70 to 80 psi which is an ideal level that optimizes the performance of the system from the first stage to the final one thereby facilitating more efficient filtering.

Furthermore, the pump features multiple sensors which help keep track of the pressure and turn on the pump as soon as the source water pressure falls below around 40 psi.

The sensors also automatically turn off the pump when the ideal pressure is obtained hence preventing any chances of overheating or other potential damages. Therefore, you are assured of consistent performance regardless of pressure variations.

Filtration Capacity

The RCC7P like its counterpart above utilizes a high capacity RO membrane that’s capable of producing 75 gallons of water per day which is large enough to handle the needs of most medium to large families.

Moreover, the booster pump helps increase the water production speed of the system allowing it to achieve almost 50% faster tank fill rate compared to its competitors.

Boosting the water pressure also has the effect of minimizing wastewater production as the pump forces more water through the filters there reducing the wastewater production to up to 50% which is quite commendable.

Installation and Maintenance

In terms of installation, the unit is designed for DIY installation with color-coded tubings and a push to connect fittings. It’s a pretty simple process that may not require the assistance of a professional if you some little technical skills.

The user manual is clear and well-written, and all the necessary parts and tools required for installation are included plus a video should you need visual instructions.

You will need to change the pre-filters after every 6 months while the post-carbon filter can last up to a year before needing to be replaced and the RO membrane can go for at least 2 years.

Both the pump and the system are quiet during operation hence you can expect no disturbance at all. They produce very little noise which you can hardly hear over normal kitchen activity.

In general, there’s no notable setback in this iSpring RO system that can cause any alarm. It’s a reliable unit that will deliver great performance especially in situations where the feed water pressure is below 40 psi. All the parts are of good quality and certified by FDA and WQA.


  • Optimum RO filtration performance through 5 stages
  • Booster pump effectively raises water pressure to ideal levels
  • Has a high pure water production rate with fairly less wastewater
  • Easy to install with all the necessary tools included
  • Both the pump and RO unit operate quietly
  • Ideal for use in areas with a feed water pressure of less 40psi
  • Backed by a 1-year warranty with lifetime support


  • The supply water valve and O-rings are not of the best quality
  • Requires a power source which may limit your installation options

Read moreiSpring RCC7P 5-Stage Reverse Osmosis System Review