Best Whole House Reverse Osmosis Systems [MUST HAVE]

Why Look For The Best Whole House Reverse Osmosis Systems?

No matter the kind or quantity of impurities present in the water source, a house reverse osmosis (RO) systems offer premium-quality drinking water at home. RO systems are one of the most thorough and effective home filters that can effectively remove contaminants from water by allowing it to pass through membranes with microscopic pores.

In our article today, we’ve compared whole house reverse osmosis systems based on the most important elements, such as flow rate, tank size, water processing effectiveness, and past customer evaluations. Additionally, we have discussed the variations in reverse osmosis systems and how to pick the best one for your house.

What is the Reverse Osmosis System?

One sort of multi-stage water filtering technique is reverse osmosis. Up to 99% of the pollutants in water can be eliminated. Water is forced through a semi-permeable membrane as part of the reverse osmosis, or RO, process to purify it of pollutants and other impurities.

The RO method generates water that is almost completely free of contaminants. So let’s further dissect this.

Reverse Osmosis Process

Simply put, consider using an orange juicer. You insert the sliced orange into the juicer after it is opened and squeeze. The orange peel and undesirable fruit remain in the juicer as the freshly squeezed orange juice flows out the other side.

The process of reverse osmosis is comparable. To separate the water from the pollutants, it uses a semi-permeable membrane. Consider the membrane to be a juicer. Only pure water is allowed via RO membranes, which remove impurities (such as peel and undesirable fruit) depending on a particle’s size and molecular charge (the juice).

Even tiny particles cannot flow through a RO membrane since its holes are only big enough for a water molecule. This means you get to enjoy delicious, contaminant-free water for drinking and cooking.

A majority of reverse osmosis systems have several stages:

  • Pre filter
  • R.O. membrane
  • Post filter.
  • Before the post-filter, some systems employ auxiliary filters to remove any remaining impurities or add beneficial minerals to the water.

The goal of each stage is to provide you with the highest quality water possible. The elements of a reverse osmosis system are as follows:


The pre-filter, which is the first stage of filtration, clears the water of debris and silt. A pre-filter that eliminates chlorine from the water might be used if necessary. The homeowners in one of our properties complained about the excessive amounts of chlorine in the water, so we built a RO water system.

The pre-filter really serves as a barrier to shield some impurities from the RO membrane, extending the life of the membrane.

RO Membrane

The reverse osmosis membrane is where the actual water filtration happens after the pre filtration procedure. Water is now pushed through the semipermeable barrier (the juicer from earlier). The majority of the minerals, impurities, or particles in the water are filtered here before being flushed down the toilet.

Auxiliary Filters

This is where you get to personalise your water thanks to new technology. To remove impurities like bacteria and viruses from your water, some reverse osmosis systems offer additional filters.

Additionally, you might have the choice to use a particular auxiliary filter to add healthy minerals to the water. This is a fantastic addition to any house, helping to create a healthier living space while also enhancing the quality of your water.


The water then passes through a post filter at the end. This carbon filter will give the water’s flavor one more polish.

RO systems utilize a storage tank to keep the processed water because the RO process is time-consuming. However, if the water is left in the tank for too long, it might begin to taste and smell like anything else.

The post-filter is crucial because it gets rid of any flavor the water may have picked up from the storage tank, which is why. Before being dispensed from the special drinking water faucet, the water leaving the storage tank first travels through the post-filter.

Best Whole House Reverse Osmosis System

US Water Systems Defender Whole House Reverse Osmosis System

The US Water Systems Defender, which was created in the USA, is suitable for use in both domestic and professional settings. The whole house RO system contains high-quality parts, including stainless steel housings (plastic is not used here), a reasonable lifespan, and a respectable 2-year warranty.

The US Water Systems Defender’s 80% efficiency rating will particularly impress you if you prefer to waste as little water as possible throughout the RO process.

This means that, for every 5 gallons of purified water generated, the whole house RO system only wastes 1 gallon of water, which is really amazing for a reverse osmosis system.

The US Water Systems Defender employs a commercial centrifugal pump since it has a far longer lifespan than rotary vane and diaphragm pumps, two other common RO pumps. The 5-micron pre-filter aids in extending the life of the RO membrane itself, and a flow meter and pressure gauge are also included so you can better manage the output of water and wastewater.

To make sure the Defender can endure up to 20 years, the manufacturer advises doing a pre-treatment. Depending on your requirements, you can select either the BodyGuard Plus Whole House Water Filtration System or the Anti-Scalant Injection System.

The filters in the Defender are simple to replace, but the manufacturer is the best source for information regarding how frequently you should do it because it isn’t readily available online.

The Defender can reject up to 99% TDS (total dissolved solids), just like the top whole-house reverse osmosis systems, and it comes with a total dissolved solids meter so you can verify the system’s effectiveness whenever you need to.


  • 80% efficiency rating
  • Comes with TDS meter, flow meter and pressure gauge
  • 20-year lifespan


  • Expensive

Crystal Quest Whole House Reverse Osmosis System

The Crystal Quest can last for 15 to 20 years if you follow the manufacturer’s recommendations and replace the prefilters and membranes as recommended. There are 9 various flow rates at which you may select to run the system, so there is something to accommodate the water pressure in every home.

The Crystal Quest is somewhat space-saving compared to other whole house reverse osmosis systems on the market, despite the fact that it is naturally bulkier as a whole-home RO system.

It is simple to perform maintenance and replace filters because the components are readily available. Given that it was created to be as cost-effective as feasible, maintaining this reverse osmosis system is relatively inexpensive.

You’ll like that the Crystal Quest employs Scientific World Products ISO Certified Components if you’re a lover of third-party certifications.

The whole house RO system is composed of four filters:

  • Sediment Reusable Pleated Filter Cartridge
  • The Coconut-based Carbon Block Filter Cartridge
  • The SMART Filter Cartridge
  • and the RO Membrane

Depending on the reverse osmosis system size you choose, the water tank can contain up to 165–550 gallons at once, making this a fantastic choice for families who need access to clean water right away.

The lifespan of your RO unit can be considerably extended by adding a variety of optional extras, including as a UV sterilizer to prevent microbiological contamination and an alkalizing post-filter to raise the pH of the water, which will cost more money up front.


  • Affordable
  • Large water storage tank
  • 3 system sizes and 9 flow rates


  • Relatively new system
  • Recommended extras require higher cost.

iSpring RCB3P

The system is mounted on a stainless steel frame and metal hanging basket, which makes it simpler to install and replace your filters and serves as the unit’s outer shell of defense. The effective RO membranes at the heart of the RCB3P may generate up to 300 gallons of pure water in a single day.

You may be sure that these membranes can get rid of even the tiniest pollutants, such germs and viruses, thanks to their .0001 micron pores.

A built-in booster pump helps accelerate the generation of filtered water. This is especially beneficial for low water pressure homes that could have trouble operating a whole-house reverse osmosis water filter. This whole house RO system doesn’t come with a tank, thus you will have to pay extra money to have your own tank.

The RCB3P can be used at work, at eateries, salons, labs, and of course at home. The reverse osmosis system includes three 100 GPD RO membranes and pre-RO filters, however you’ll need to think about post-treatment on your own, such as UV or alkalizing filters.


  • Affordable & great value
  • Built-in pressure booster pump
  • Can reduce more than 1,000 contaminants


  • Tank not included.
  • May have damaged/broken fittings.

WECO HydroSense Light Commercial RO Water Filter System

Up to 99.9% of contaminants can be removed with the WECO HydroSense’s four stages of filtration. Prior to passing through two 5-micron activated carbon filters, water passes through a sediment filter that eliminates debris like silt and rust.

These eliminate sulfur odors as well as organic contaminants such chloramines, THMs, chloramine byproducts, and chlorine.

In order to remove everything from heavy metals to salts, radon, fluoride, germs, and much more, water is finally driven through the RO membrane.

Installation is comparatively easy because the system is pre-assembled; you can complete the installation with simple hand tools. WECO suggests, however, that you employ a qualified plumber to install the system; of course, this will include a fee.

The instructions say to “watch your pH and replace as needed,” but I would suggest getting a TDS (total dissolved solids) meter and replacing the filters when your reading starts to rise in order to retain the filter performance.

Although the WECO appears to be a decent deal at $1,500, it’s important to remember that this isn’t a full-fledged whole-house reverse osmosis system. Your own drinking water storage tank, jet pump, and any other necessary equipment will need to be purchased separately, which will increase the cost of your overall investment.


  • Four thorough stages of filtration
  • Easy to install
  • Includes an automatic electric booster pump


  • Not a complete reverse osmosis system

APEC ROES-PH75 RO Water Filter System

Our choice for the best whole-house reverse osmosis system for the money is the APEC ROES-PH75 Reverse Osmosis Water Filter System. To provide the purest water possible, it has a six-stage filtration system that combines reverse osmosis and activated charcoal.

It eliminates a variety of pollutants, such as chlorine and VOCs. lead, arsenic, and other things. It has a faucet and has a daily capacity of up to 75 gallons of purified water.

The APEC ROES-PH75 Reverse Osmosis Water Filter System’s only significant drawback is that it is challenging to install.


  • Six stage filtrations
  • Can produce Seventy-five gallons per day
  • Removes a wide range of contaminants


  1. Complicated installation.

Whole House Reverse Osmosis System Buyer’s Guide

The most expensive option for household water treatment is whole-house reverse osmosis. This shouldn’t deter you if you are aware of the distinctive advantages of a RO system. If you decide to go this route, you should, however, be sure that a whole-house reverse osmosis system offers the best value for your money.

How Does a Whole House RO System Work?

Before your heater, a whole house RO system is installed at the point of entry, or the place where your water supply enters your home. This means that before any water can get to your faucets and appliances, it must first go through your reverse osmosis system.

Water is passed through several filters, including—and this is key—a semi-permeable reverse osmosis membrane, in order for a whole home RO system to function. This membrane, which is essential for creating RO-purified water, has tiny pores that prevent most pollutants from passing through.

Water particles can flow through the barrier because they are small enough, but practically all other types of impurities are too large. The pollutants and a little amount of wastewater that cannot pass through the membrane are discharged down a drain.

The appeal of a whole-house reverse osmosis system is clear: it can provide cleaned water for every room in your house.

You can be sure that the water has been filtered to remove any undesirable components no matter where you are in the house and whether you are using it in an appliance or directly from your faucet. Whole house reverse osmosis systems are the solution if you want the best defense against waterborne pathogens.

Advantages of Getting Whole House Reverse Osmosis Systems

Here are a few reasons why you should consider getting a whole house reverse osmosis system:

Simple Fix for the Whole House

If the water in your neighborhood is really bad, you might require a water treatment system for your home, including a shower filter, an under-sink water filter, and a filter to safeguard every device.

A POE reverse osmosis water filtering system may take care of everything at once, saving you from having to buy individual filters, each of which needs installation and upkeep.

Enhances Water Taste

A whole-house reverse osmosis water filtration system will allow you to consume water from any sink in your home. Not only will the entire water supply in your home be safe to drink, but trace toxins will have been eliminated, so the water will taste cleaner. You can save money if you currently drink bottled water by switching to filtered reverse osmosis water.

Effective Option

Reverse osmosis is the only whole-house filtration method that is truly effective. By removing more than 99.9% of pollutants, whole house RO systems can significantly enhance the quality of drinking water.

If you’re also considering conventional whole-home filters, a reverse osmosis water filter will show to be the superior option if full pollutant removal is what you’re looking.

Increases Lifespan of Appliances

Deposits of iron, sulfur, and limescale can harm your dishwasher and washing machine. Water pollutants are removed by whole-house RO systems, extending the life of your water-based appliances.

Improves Skin & Hair

Showering in water contaminated with calcium, magnesium, or chlorine can irritate the skin and scalp. It may be more common for your skin condition, such as eczema, to flare up if you already have it.

To keep your skin and hair healthy, a whole-house reverse osmosis system can filter out harmful impurities before they get to your shower.

Disadvantages of Getting Whole House Reverse Osmosis Systems

There are no perfect whole house RO systems and everything has their drawbacks. Here is a list of disadvantages of getting a whole house RO system.


The most expensive household water treatment solution is usually a whole-house reverse osmosis system. They can cost upwards of $8,000, and that is just for the first purchase. If you want your system to last past its first birthday, you will also need to pay for filter replacements and replacement parts over time.

I wouldn’t advise this filtering system for you if you’re not ready to incur ongoing maintenance fees.

May Require Pre- or Post-treatment

Reverse osmosis systems for the entire house are rarely installed by one person.

To keep your water’s high standards and protect them, they often need some kind of pre- or post-treatment.

To prevent damage from hardness minerals, you might need to install a water softener before the RO system, and you might need to install a neutralizing filter after the system to address high acidity and bring pH back up to neutral.

To purify water that may have picked up impurities in the RO storage tank, you may even require a UV filter. Due to its greater solvent capacity, reverse osmosis water is more likely to pick up contaminants like dissolved metals as it travels to your faucet.

High Water Waste

Compared to under-sink options, there are numerous whole-house RO systems that are far more effective. A complete house Reverse Osmosis water filtration system is likely to waste a lot more water because it is larger and treats more water each day.

Keep in mind that a whole-house reverse osmosis water filtering system will have filtered even your toilet and bath water. The precise quantity of water you waste depends on how much water you use each day, but it shouldn’t significantly increase your water bill.

Requires More Space

Although tankless under-sink reverse osmosis systems are becoming more and more common, a whole-house RO water filter system simply cannot be owned without a storage tank.

When you need it, the storage tank has a clean water supply that is available to be delivered to your faucet. The issue with this is that you’ll need much of space for it because a whole house RO storage tank is often enormous. This system might not be an option for you if your garage or basement aren’t big enough.

Requires Sufficient Water Pressure

To run a whole-house RO water filter system, the water PSI must be at least 40. You will need to buy a pressure pump to increase the pressure at your POE if it is any lower than this.

Reverse osmosis requires sufficient water pressure, which is crucial. If your pressure is too low, water won’t be able to flow through the filters with enough force (and even if it does, it won’t flow very far from your faucets and showerheads, which isn’t ideal). If you don’t already know your PSI number, conduct a water test to determine pressure.

What To Consider when Shopping for the Best Whole House Reverse Osmosis Systems

Before you go off and buy a whole house reverse osmosis system right off the shelf, here are a few factors that you need to take into consideration when choosing the best Whole House Reverse Osmosis System for your home.

Water Source

Your choice of product could be influenced by the characteristics of your water, like as its pH and the toxins it contains.

To safeguard the reverse osmosis membrane and guarantee the system has a long lifespan, it is strongly advised that you buy a water softener to install before your RO system if you have hard water.

Unusually high or low pH can also harm the membrane, but if your water comes from a municipal source, you shouldn’t experience any issues in this area.

You don’t need to worry too much about the composition of your water because reverse osmosis almost eliminates any contaminants. To safeguard the reverse osmosis membrane, it is still advisable to do a drinking water test in advance to see if you would need to install an inline pre-filter, such as a sediment filter, before your RO system.

When you use a private well for your water, this is extremely worthwhile.

Consumption of Water

The majority of whole home reverse osmosis systems come in a variety of sizes, and depending on how much water you consume, you can select the best size.

I’m going to assume that you want to purchase a reverse osmosis system for your residence rather than for a business. Most of the time, the simplest filtration system will be adequate for you.

The larger RO systems are a bit overkill for a regular family of 4 (not to mention that they probably wouldn’t fit comfortably within a cupboard), as many full home RO systems are commercial-grade.

Even so, it’s worthwhile to calculate your daily water use because doing so will assist you choose the flow rate at which to install your RO system (more on this below). To get a general notion of how much water you consume, you can use this helpful water use calculator.

Simply take a reading from your smart meter at the end of each day for seven days to determine your average.

The size of the storage tank you require will also depend on how much water you use. More water may be kept in storage at once the bigger the tank is. Again, unless you run a home laundry service or take 5-hour showers, you’ll probably be good with the smallest tank offered with entire house RO systems.

Water Pressure & Flow Rate

As I previously stated, the majority of homes have water pressure levels of at least 40 PSI, which is the very minimum needed to run a full house RO system.

However, if you are aware that your home has low water pressure (telltale indicators include whistling in the pipes, sluggish washing machines or dishwashers, and restricted shower flow), you might want to think about installing a booster pump.

A booster pump raises the water pressure in your home, ensuring that there is adequate pressure to push water through your RO system and throughout the rest of your home. A benefit that many of us now take for granted is being able to utilize several water-based appliances at once, which is another benefit of having adequate water pressure.

A conventional booster pump will require electrical connection to a power source. You can find numerous possibilities online for about $100 and $200, but before you purchase a full house system, wait to purchase a pump because many already come with one.

If you’re unsure whether your home needs a booster pump, you can measure your water pressure in PSI using a pressure gauge.


Reverse osmosis water filtration systems need several different pumps in addition to a pressure pump. There is a device known as a demand pump that is required to efficiently move filtered drinking water from your storage tank to the point of use (your faucet, shower, toilet, or other water-based appliance).

When “demand” for water exists, a demand pump activates (i.e. you switch on an appliance or open a faucet). With the help of this pump, you can acquire water immediately and without needless delay.

Demand pumps are typically incorporated in whole-home reverse osmosis water filtration systems, which raises the whole house system unit’s overall initial cost. Should you feel the need for one and your RO system doesn’t have one, you can purchase one for less than $100.

Filtration Stages

There are often numerous different filter stages in reverse osmosis filtration. A pre-filter comes first, then an activated carbon filter. The reverse osmosis membrane is next added, and the procedure typically concludes with a post-filter or final activated carbon filter.

There may be a few identical filtering steps in the reverse osmosis water filtration system you choose. For instance, two reverse osmosis membranes or two pre-filters are frequently used in POE reverse osmosis filtration systems to ensure that the water is pure and suitable for drinking.

Despite the fact that a UV purifier is not usually included with a reverse osmosis water system, many manufacturers strongly advise buying one to install after your storage tank. As bacteria and other pathogens build up in storage tanks over time, a UV purifier can eliminate any potential impurities in your drinking water before it reaches your faucet.

Optional Remineralization Filters

Whole home systems filter everything out of your drinking water, including the beneficial components, like all reverse osmosis systems do.

Most municipal water sources contain beneficial minerals like calcium, magnesium, and potassium. We acquire a lot of these minerals through our diets, but you may install a whole-home remineralization filter if you like their flavor or simply wish to benefit from them in your water.

Undoubtedly, a remineralization filter will be more expensive. Furthermore, whole-home remineralization filters are somewhat difficult to find.

Alkalizing filters are increasingly widely used and, according to some manufacturers, are absolutely necessary for whole-home filtration. Following reverse osmosis treatment, an alkalizing filter raises the pH of the water (which is naturally pH-lowering).

This not only enhances the flavor of the water but also makes it safer to store because water with a low pH is more likely to pick up impurities on its way to your faucet.

Wastewater Ratio

It will please you to learn that POE RO filtration systems typically have a fairly good wastewater ratio. While many whole-home reverse osmosis water filters can do the opposite, using only 1 gallon of water for every 4 gallons generated, a standard under-kitchen sink filtration system may waste 4 gallons for every gallon produced.

You won’t see a notably large gallons-per-day water waste cost added to your water account until you use a lot of water (I’m talking thousands of gallons per day).

Storage Tank Capacity

A typical whole house reverse osmosis system is built for both household and commercial use, so even the smallest filtration system will have a relatively large storage container. I’ve previously covered storage tank capacity in the points above, but I’ll mention it again here.

For the majority of families, the smallest tank size (about 150 gallons) will be more than adequate to give you a regular, reliable water supply. You only need to make sure that you didn’t because your storage container will automatically replenish itself to make up for any water lost:

  • Use so much water at once that the tank is completely empty.
  • Use water more frequently than the RO system could handle (i.e., more frequently than the vessel could be filled).

A 150-gallon tank would only need to completely replenish itself once every day because a household of four uses approximately 300 gallons of water every day. And you wouldn’t even realize it was occurring.

Only if you have a particularly large family or consume more water than typical would it be worthwhile to take into account a larger tank. Tanks have a capacity of 500–600 gallons, but keep in mind that bigger tanks require more room.

Installation & Maintenance

A POE water reverse osmosis machine installation calls for some fundamental DIY abilities and plumbing expertise. Even while some whole house systems are rather simple to install, manufacturers typically advise hiring a plumber to perform it so that you can be sure you follow all local regulations.

Surprisingly little information regarding how frequently to change the filters in a POE RO application can be found online from both whole-house reverse osmosis unit manufacturers and water treatment specialists. The typical reverse osmosis filter, however, needs to be changed every year. Pre- and post-filters as well as the activated carbon filter are included in this.

The majority of carbon, pre-, and post-filters are quite simple to replace; you simply click or twist them out of the unit’s main body and then do the opposite to insert the new filters. To maintain the whole house system unit’s integrity and guarantee a constant high flow rate, it’s critical to remember to replace these filters as needed.

The quantity of municipal water you use each day will have an impact on both the frequency of filter replacements and the quality of your purified water.

It makes natural that the filters would clog more quickly if your filtration system was working harder to create filtered water or if it was just producing more gallons of filtered water each day. How frequently you should replace the carbon, pre-, and post-filters should be specified in your user handbook. If you’re unsure, ask the maker.

Depending on the quality of your water source, reverse osmosis membranes must also be replaced, often every two years.

Finally, with regards to installation and maintenance, if you’ve installed other whole house system units (like a water softener) to safeguard your RO unit or further enhance your water quality, you will also need to perform routine maintenance on them.

Ongoing Costs

The replacement of the reverse osmosis membrane, pre- and post-filters, and carbon filters is the POE RO system’s largest continuing expense.

You’ll have fewer options for new filters because whole house RO is less popular than POU applications like under-kitchen sink RO. To ensure that you acquire the appropriate filters for your equipment, you’ll probably need to purchase straight from the manufacturer. You’ll have to pay a few hundred bucks a year for this.

The price of water waste is another expense associated with a POE RO unit that should be considered.

For the purposes of simplification, assume that your RO treatment wastes 1 gallon of tap water for every 1 gallon of filtered water that is created.

This wastewater-to-filtered water ratio means that if your household used 300 gallons of municipal water per day, you would also waste 300 gallons per day, bringing your total water use to 600 gallons per day.

Fortunately, many whole home RO systems are built to use much less water per gallon of filtered water, but if you can’t find any information online, it’s worth contacting the manufacturer.

Should You Invest in a POE RO System for Your Home?

When alternative water filtration techniques are unable to deliver the necessary results in terms of filtered water purity or quality, that is the major reason, in our opinion, to install a POE reverse osmosis system in your home.

To be absolutely honest though, this is uncommon. Combining a standard whole-house water filter, which cleans the water you use for showering, washing dishes, etc., with a countertop or under-sink reverse osmosis system, which offers clean drinking water at a single point of use, may help you get satisfactory results.

Other than that, manufacturers might advertise their goods to make you believe they are whole-house water systems. Reverse osmosis is the top choice, the pinnacle of all units, and what everyone should strive for. However, it’s not always essential.

What qualities are you seeking in a RO unit? You don’t absolutely need to install a full house water filtration system if all you want to do is filter your drinking water or save money by not buying bottled water.

Whole house RO is a choice if you also want to increase the lifespan of your home’s water-based technology and take purified water showers.

A water softener or POE water filter are two less expensive alternatives that might be just as efficient. Keep in mind that the purified water produced by RO frequently has a low pH, making it possibly unsuitable for usage throughout the house.

Frequently Asked Questions

How much does a whole house RO system cost?

The variation of prices is enormous. Less expensive systems start at a few hundred dollars, excluding the cost of the storage tank package. Large homes can easily require setups that cost more than $2000 USD.

Is reverse osmosis water healthy to drink?

Since reverse osmosis removes all impurities, it is safe to drink. However, before drinking, we advise adding minerals to the water.

Do I need a whole house RO filter if I own a water softener?

Minerals in hard water are removed using a water softener. On dangerous chemicals and other water contaminants, it has essentially little impact.

How Long Does a Whole House Reverse Osmosis System Last?

If properly maintained, the typical POE RO unit can survive up to 15-20 years after installation. For the filtration system to last this long, you’ll need to undertake routine maintenance and safeguard it with extra filters, like water softeners.

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