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

Product Overview

ProductAPEC Essence ROES-50 Reverse Osmosis System [50 GPD]
BrandAPEC Water
Rating4.7 out of 5 stars (4.7 / 5) (More than 360 reviews)
Recommended price190 USD (Check the latest price at Amazon.com)

Product Specifications

Pre-filters1 sediment filter
2 carbon block pre-filters
RO membrane0.0001 micron
Post-filtersRefining coconut carbon filter
Incoming Water Pressure40 – 85 PSI
TDSAbout 20 – 60 PPM
Storage tank4-gallon capacity
3.2-gallon holding
Tubing 1/4 ” Color-code tub
FaucetLead-free designer faucet
Fitting & adaptors1/4 ” tub
1/2″ or 3/8″ versatile feed water adapter
Waste Water to Filtered Water Ratio4:1
FeaturedFDA Certified JG Food grade tubing
2 year extended manufacturer warranty with registration.
DocumentsUser Manual [PDF]
Warranty [PDF]

Satisfying Chart

(Estimation from the verified purchase customers)


Installation Guide

This video shows you step-to-step how to install the APEC Water Essence series Reverse Osmosis System.


What is the water pressure from the tank? Can I install it in the basement and use the water on the 1st floor?

The system should be able to support up to 20′ vertical travel and 40′ horizontal travel.

Can I use an alternate drum for the water storage instead of the tank?

Yes, if just for the water storage purpose only. The function of the RO storage tank is pressurized to make sure the water flow at the faucet is strong enough for use.

Should I clean the tank regularly?

No, the tank does not require to clean regularly. If the system is not in use for a long period of time, you should flush the tank several times before you can use it.


Images Gallery

APEC Water ESSENCE ROES-50 5-Stage Reverse Osmosis System

APEC Water ESSENCE ROES-50 5-Stage Reverse Osmosis System
APEC Water ROES-50 system comes with Lead-free faucet
APEC Water RO system comes with Lead-free faucet
APEC water ROES-50 - 5 Stages in details
APEC water ROES-50 – 5 Stages in details
APEC Water ROES-50 - Components
APEC Water ROES-50 – Components
APEC Water ROES-50 - Filters set replacement
APEC Water ROES-50 – Filters set replacement
APEC Water ROES-50 - Fitting & adapters
APEC Water ROES-50 – Fitting & adapters

Quick Navigation

Product Overview | Specifications | Description | Installation | Product Photos | Related Products