APEC Water Filter

APEC Water Systems: 2021 Reviews & Buying Guide

Shopping for an APEC water filter?

If you have been looking for an APEC Water filter than you’ve come to the right place.

APEC – short for Advanced Purification Engineering Corporation –is an American manufacturer of water systems, mostly water filters.

They are based in City of Industry, California.

The company sells a wide variety of water filters including under-sink reverse osmosis systems and whole house water filters and softeners.

What’s In this Buying Guide?

In this buying guide, we explain the different APEC water systems and recommend the best ones for your home.

Table of Contents

Why Should You Consider APEC?

Roes 50

Here are some of the top reasons why you should choose an APEC water filter.

Quality: APEC water filters are known for their quality, reliability, and durability. They mostly have positive customer reviews.

Affordable: APEC whole-house, under-sink, and reverse osmosis water filters are usually cheaper than other brands. They are also inexpensive to maintain, thanks to the affordable replacement filters.

Certified: Some of APEC’s water filters, including the popular APEC RO-90 reverse osmosis filter, are WQA-certified. This means they actually remove what they say they do.

Easy Installation: APEC’s water filters are designed for easy DIY installation with the essential tools. Most come with all the parts you need for installation.

Warranty: Most of APEC’s systems come with a 1-year warranty while a few have a 10-year warranty. The warranty covers material and workmanship defects as long as the system is under normal use.

Expert support: Even after the warranty expires, you’ll still enjoy expert support from APEC for any issues related to the water filter. They have in-house WQA-certified water specialist who will answer all your questions, no matter how technical.

Social impact: When you buy an APEC filter, you are supporting the Free Drinking Water charity program. APEC donates water filters to low-income individuals with health problems such as cancer. 

Best APEC Water Filters (Comparison Table)

  • WFS-1000

  • Best tankless under-sink filter
  • Type:
    Under-sink carbon filter

  • No. of Stages:

  • Warranty:
    1 year

  • MAX15

  • Best whole house filter
  • Type:
    Whole house filter and softener

  • No. of Stages:

  • Warranty:
    10 years

  • ROES-50

  • Best budget APEC RO filter
  • Type:
    Under-sink RO filter

  • No. of Stages:

  • Warranty:
    1 year


  • Best for mineral water
  • Type:
    Under-sink RO filter

  • No. of Stages:

  • Warranty:
    1 year

  • RO-90 Supreme

  • Best for large families
  • Type:
    Under-sink RO filter

  • No. of Stages:

  • Warranty:
    2 years


  • Best portable RO filter for temporary use
  • Type:

  • No. of Stages:

  • Warranty:
    1 year

Best APEC Water Filters (Reviews)

apec water filtration



Our Review

The APEC WFS-1000 is a 3-stage under-sink water filtration system that removes sediment and various chemicals from drinking water.

It’s a great choice if your water has a strong chlorine taste and smell, or if you are concerned about the presence of pesticides, VOCs, and other chemicals in your tap water.

The system’s three stages consist of a sediment filter that removes dust and other suspended particles, a carbon block filter that removes tastes, odors and cloudiness and a final carbon block that further clarifies the water.

Note: Unlike the APEC reverse osmosis filter, the WFS-1000 does not remove microbes, nor does it reduce TDS levels. Only use it with treated city water.

Being a 3-stage system, it does take up a bit of space under the sink. But you can install it in another location such as the basement.

The WFS-1000 comes with its own lead-free chrome faucet.

The system comes with a complete installation kit. You don’t need to purchase any additional parts or fittings.

You also don’t need to pay a pro to install the filter for you. It is designed for quick DIY installation. The only part that might trouble you a bit is drilling a hole in your sink for the new faucet.

If you are lucky, your sink might already have a spare hole that you can use.

We love RO systems for their excellent filtration, but the slow water flow can be frustrating at times. The WFS-1000 has no such problem.

Since there is no RO membrane to slow down the water, you get a flow rate almost as strong as that of your normal tap. You don’t even need a reserve tank. Just turn on the faucet, and clean filtered water flows out.

As for maintenance, the only thing you need to do is replace the filters every year. The filter’s cartridges take less than 15 minutes to replace.

apec water systems


This Water Filter Is Perfect for You If...

You are looking for a fast-flowing under-sink water filter that can remove chlorine and other chemicals from your tap water.



apec whole house water filter



Our Review

The APEC MAX15 is a 2-in-1 whole house water filter and softener.

The filter part consists of catalytic granular activated carbon, a much more effective filtration media compared to normal activated carbon.

It removes chlorine and chloramine from water and their associated tastes and odors. It also filters out VOCs and other potentially dangerous chemicals in tap water.

Unlike other carbon filters, this one doesn’t need to be replaced every few months. It has a lifespan of 10 years.

To maintain filtration performance, an electronic valve head monitors water flow and automatically triggers a backwash to remove trapped contaminants.

The second stage is the water softener. Unlike traditional water softeners, the MAX15 does not use salt to remove hardness minerals from your water.

It is a salt-free water softener. In fact, if you measure your water hardness before and after filtration, there’ll be no change.

That’s because the system doesn’t actually remove the hardness minerals from water, nor does it add salt.

Instead, it uses a ceramic media to change the behavior of hard water such that it does not deposit scale on surfaces.

This protects appliances and plumbing, makes it easier to wash with water, and improves the quality of your shower water.

The benefit of the salt-free system is that it doesn’t require any backwashing, no salt refills, and it doesn’t waste any water.

Note that the water softener is effective for up to 25 grains of hardness.

This is a whole-house water system, so installation is bit more involved than that of an under-sink filter. APEC recommends you have basic plumbing skills to install it.

The APEC MAX15 is designed for large homes with 3-6 bathrooms.

ro water filters reviews


This Water Filter Is Perfect for You If...

You are looking for a system that can filter and descale your water.

APEC ROES-50 Top Tier Reverse Osmosis System



Our Review

The APEC ROES-50 is one of the most affordable RO systems.

It doesn’t have a re-remineralization filter like other pricier RO systems, and the daily capacity is a bit low, but it’s just as effective at purifying water.

The ROES-50 has 5 filtration stages.

First is a sediment filter that pre-filters dust, sand, and other large particles from the water. This protects the other filters from clogging.

Then two carbon block filters clarify the water by removing chlorine/chloramine tastes and odors. They also eliminate chemicals such as VOCs, pharmaceuticals, and pesticides.

At the heart of the system is a semi-permeable membrane that removes 99% of total dissolved solids, including heavy metals, fluoride, and arsenic. It also removes microbes, including bacteria, viruses, and cysts.

Just before the water comes out of the faucet, it passes through a final refining carbon filter that removes remnant odors and tastes the water may have picked up from the reserve tank.

The system produces up to 50 gallons of purified water per day, assuming a sustained water pressure of at least 50 psi (if your home has low water pressure, the daily capacity will be less).

Though that’s less than the 70-90 GPD most RO systems produce, it’s still plenty of water for most families.

The APEC ROES-50 takes about an hour or two to install. Everything you need including food-grade quick connect fittings, a reserve tank, all filters, and a lead-free faucet is provided.

reverse osmosis system reviews


This Water Filter Is Perfect for You If...

You are looking for an inexpensive under-sink reverse osmosis system.





Our Review

If you want an RO system that produces mineral water, we recommend the APEC ROES-PHUV75 filter. It is a 7-stage RO system consisting of the usual filters, a bonus UV filter, and a mineral filter.

Here’s how the first four stages are arranged: a sediment pre-filter that targets larger particles, double carbon block filters to remove chlorine and other chemicals and an RO membrane that removes TDS and microbes.

The fifth stage is a UV light sterilizer. It complements the RO membrane in neutralizing waterborne bacteria, cysts, and viruses.

The sixth stage is the post-filter. It is located after the tank. It removes any odors and tastes the water may have picked up while sitting in the tank (a common issue with many RO systems).

The seventh and final stage the water passes through is the remineralization calcium filter. It adds small amounts of calcium back into the water to improve taste and increase alkalinity.

Thanks to the ROES-PHUV75’s 7-stage filtration, specifically the calcium filter, the purified water doesn’t have the flat and sometimes slightly acidic taste you get from other RO systems. Many users say it tastes like bottled water.

The extra two stages – the mineral and UV filters – add quite a bit to the price tag compared to the 5-stage ROES-50 system. It’s up to you to decide whether you want to spend more on mineral water and UV filtration.

Installation is straightforward. Everything you need is provided including food-grade tubing (color-coded for easy installation), valves and a lead-free designer faucet.

The ROES-PHUV75 doesn’t come with a permeate or booster pump. So don’t expect a strong water flow. But it’s enough for drinking purposes.

Water efficiency is also average with an average of 3 gallons wasted for every gallon of purified water.


This Water Filter Is Perfect for You If...

You are looking for an RO system that produces mineral alkaline water. Also ideal for those who want the added protection of a UV filter.



ro filter



Our Review

For large families that need a lot of drinking water every day, we recommend the APEC RO-90 reverse osmosis system.

It is the highest capacity ro filter from APEC with a daily production capacity of 90 gallons.

To cater to the increased output, the RO-90 system uses higher-capacity filters that last longer. The pre-filters last for 12 months before needing replacement while the membrane is good for 3-5 years.

The RO-90 has five filtration stages, the exact ones found in the RO-50: a pre-filter, two carbon blocks, a semi-permeable membrane, and a post-filter.

It does not have a re-mineralizing filter. If you want an APEC filter that gives out mineral water, you’ll have to do with the 75 gallon-a-day ROES-PHUV75 that we’ve reviewed above.

It also lacks a permeate or booster pump. So the flow rate is not very robust – but’s it’s good enough for most people’s needs – and the system wastes more water than RO filters with a booster pump.

It comes with a complete installation kit, which should take you about 1-2 hours to put together under your sink.

You don’t need plumbing skills to set it up. But if you are short of time, you can always hire a pro to set it up for you (Warning: labor costs to install the RO system can be as much as or higher than the purchase cost).

apec water systems


This Water Filter Is Perfect for You If...

You are looking for a high-output APEC RO filter that can produce enough drinking and cooking water for your large family.

apec ro



Our Review

The APEC RO-CTOP-Countertop RO system is for those who don’t want or cannot install a full size under-sink reverse osmosis filter.

If you only want a temporary filter, you live in an apartment or dorm room that won’t allow you to mess with the plumbing, or you simply don’t have enough space under your sink, the APEC RO-CTOP-C is perfect for your situation.

It is a compact 4-stage RO system that fits neatly on your countertop. It’s small (and light) enough that you can even carry it with you for use in hotel rooms, RV, boat or a friend’s house.

It connects directly to your faucet, similar to other countertop water filters. It fits most standard faucets and takes less than 5 minutes to set up.

The RO-CTOP-C’s filter arrangement is almost similar to that of full-size systems. The main difference is that it has one carbon pre-filter instead of two.

But the sediment and activated carbon pre-filters do a pretty good job filtering out particulates, chlorine, and various chemicals before they clog or damage the membrane.

The third and fourth stages are the RO membrane and a post-filter.

Another major difference between the RO-CTOP-C and larger systems is the lack of a reserve tank. When you open the lever on the faucet adapter, water is purified right then.

This has one big downside: the flow rate is extremely low. Water comes out in a slow trickle.

Users recommend filling a water pitcher or bottle beforehand for easier access to drinking water.

Overall, the RO-CTOP-C is a handy alternative for those who can’t install an under-sink system. It is a bit pricey, though, considering its size and flow rate.

apec water


This Water Filter Is Perfect for You If...

You are looking for a good quality countertop RO filter for your home, office, boat or RV. Also ideal for those looking for a temporary or portable RO filter.

How Are The APEC Water Systems Different From Other Systems?

APEC water filters stand out most because of their value for money. You can get a high quality under-sink or reverse osmosis water filter for much less compared to other brands like Home Master.

That’s not to mean that APEC’s system are worse. Sure, they don’t have some of the features available in Home Master filters like the modular filter design or Fast Flow RO kit. But they still filter water just as well.

Another thing we love about APEC is the wide variety of water systems they have. Whatever kind of home water filter you need, they likely have it. Their catalogue includes RO systems, under-sink filters and whole-house systems (both filters and water conditioners/softeners).

Just about the only type of water filter they don’t sell is a faucet-mounted filter.

The wide range of products and prices allows you to get the exact filter you need for your home at the price that works best for you.

Buying Guide: What to Look for in an APEC water system

Type of System

The first thing to decide is what kind of water system you need. This depends on your needs. Here’s what each type of filter is good for.

Under-sink water filter: Great for filtering chlorine, chloramines, sediment and chemicals from municipal water.This is a point-of-use filter, meaning you’ll get filtered water from only one faucet in your home.Some under-sink systems are designed for use with well water.

Under-sink RO system: Great for filtering chlorine, chloramines, sediment, chemicals, heavy metals and microbes from municipal or well water. Get an RO system if you are concerned that your drinking water may contain heavy metals or bacteria.

Whole house water filter: Suitable if you want to filter all the water coming into the house.Most whole house filters can remove chlorine, chemicals and sediment from municipal water. If you use well water, look for a water filter designed to remove contaminants like iron that are common in underground water.

Whole house water softener: Suitable if you live in a hard water area.A whole house water softener reduces the hardness of all the water coming into the house. Some systems are salt-free. Instead of adding salt to the water to soften it, they change the behavior of hardness minerals to reduce scale.

Filtration Stages

The number and type of filtration stages of an APEC system tells you how well it filters water and what it filters out.

A 7-stage system will be more effective compared to a 5-stage system. Check the type of filters used as well. For instance, a system with a catalytic carbon filter will do a better job filtering out chloramines and chlorine compared to a system with conventional activated carbon.

If you use well water, look for a system with special filters that can eliminate iron, hydrogen sulfide and other contaminants common in well water.

If you are worried about germs in the water, look for a system with a reverse osmosis membrane or a UV sanitizer (or both).


Check the system’s GPD figure before you order it. GPD stands for gallons per day, or the amount of filtered water a particular system can produce in a day.

The bigger your family, the more GPD you need. To figure out the right capacity, estimate how much filtered water you’ll need in a day. Obviously, it’ll be much higher for a whole house system (in the thousands or tens of thousands) compared to an under-sink system (most have a 50-100 GPD capacity).

Ease of Installation

How easy an APEC water system is to install depends largely on the type of system. Under-sink systems have an easy (but time-consuming) DIY installation process.

With a whole-house system, you may to call a pro to plumb it in.


Finally, check what kind of maintenance the water system requires.

For water filters, check how many filters there are to replace and after how long each needs replacing. Don’t forget to look up the price of replacement filters; it’ll help you estimate the system’s maintenance cost.

For water softeners, check how often you need to add salt.

In addition to salt and filters, check if the system has additional consumables that need regular replacement.

APEC Water System Complaints

The most common complaint from APEC customers, particularly regarding the under-sink system, is the low flow rate. This is especially an issue with reverse osmosis systems.

Fortunately, this is a problem you can solve easily by adding an electric or permeate pump to the system.

Another area where APEC is behind some other brands is warranty. APEC offers a standard 1-yeae warranty for most of their systems, whole Home Master offers a 2-5 year warranty on their systems.


Do APEC water systems last long?

With proper maintenance, most APEC water systems will last you at least 10 years. 

When should I change my APEC water filter?

It depends on the type and size of filter. For under-sink RO systems, the pre-filters last 1 year while the RO membrane is good for 3-5 years.


For whole house systems, filter lifespan is given in gallons of water. Check the user manual for instructions on when to replace each type of filter.