Whole House vs. Under-Kitchen Sink Water filter – Pros & Cons

Although the municipal water supply is passed through treatment processes before ending up in your pipes and then in your glass, it can still contain impurities that alter its quality and make it hazardous to your health. In this article, we will compare two of the best filtration methods that you can use to ensure clean water so that you know what you should opt for, more precisely whole house and under-kitchen sink filters.

The municipal water supply is passed through rigorous treatment processes, but this doesn’t mean that it’s completely free of impurities when it reaches your glass. The road is long and the hazards are many. This is the reason why it’s smart to not take any chances and pass the water that you end up consuming and using for various tasks through a filtration process of your own. In this article, we will compare two of the most effective water filtration methods at the moment, more precisely whole house filters and under-kitchen sink filters. By doing so, we will help you more easily decide what course of action you should take in order to ensure 100% clean, safe, and pure water in your home.

Why Water Filtration Is Necessary

Researches and studies show that there are over 2100 different types of known contaminants that lurk in tap water. What’s even scarier is the fact that a good portion of them are poisons, so the water that you drink and cook with might actually do a huge load of damage to your health. This doesn’t mean that the rest of the impurities found in it are any less dangerous, drinking contaminated water usually leading to symptoms such as nausea, vomiting, fatigue, and even diarrhea. Unfortunately, there are cases where prolonged consumption of impure water leads to serious health problems, such as cancer for example. In extreme cases, even death can occur. Thus, it’s easy to understand why water filtration is necessary in order to lead a long and healthy life.

About Whole House Filters

Whole house filtration systems filter all the water that enters your home prior to it being distributed to water outlets in the kitchen or the bathroom. These point-of-entry filters are the preferred choice of those who have high amounts of chemicals and other dangerous contaminants in the water that runs through the pipes as they need to be ensured that clean water comes out when they’re showering or doing other activities, not being solely interested in clean drinking water.


The advantages of whole house systems are quite interesting and they are likely to convince you to install such a unit yourself. Here is a list of the important pros that accompany this investment:

  • Convenience: The water gets purified as soon as it enters your home, so regardless of your needs, you are ensured that the water you’re using is clean. Cooking, cleaning, hydrating yourself, and even bathing become a lot safer with this wonderful addition.
  • Clean bath/shower water: What makes whole house units undoubtedly superior to all other filtration system is the fact that they provide clean bath and shower water without there being a need for special fixtures or other types of modifications.
  • Cleaner air indoors: A little-known fact is that these systems actually help make the air indoors cleaner as well. In a lot of areas, the water is treated with chloroform gas that is highly dangerous to our health. The filtration system ensures that the air will be free of this contaminant as it removes it before it has the chance to reach the water sources in your home.
  • Cost efficient: This type of system can prove to be quite cost effective as well as it eliminates the need for installing separate filters for every water outlet around the house. It’s a single unit that effectively handles all contaminants, sparing you of additional costs.


Of course, nothing is perfect, so it’s understandable that there are a few drawbacks to whole house systems.

  • Complicated installation: Unlike under-sink models, whole house systems are a lot harder to install. They require more plumbing skills, so there’s a high possibility that you might have to call in a plumber for the task. Nonetheless, there are handy people who can manage this installation on their own without a problem.
  • Modest performance: Although whole house models are quite effective when it comes to water purification, they don’t do as great of a job as other types of systems do. There are some chemicals, heavy metals, and other types of impurities that the filtration system won’t be able to remove, so the water you’re using won’t be 100% cleared of impurities. But this isn’t bad news as you can find a model that is compatible with removing the type of contaminants you’re faced with.

About Under-Sink Filters

Instead of robbing space from the counter like countertop filters do, under-sink models are installed, as their name says, under the sink. In a crowded kitchen, these filtration systems make for the perfect addition, this being one of the main reasons why so many people opt for them instead of other types of systems. Additionally, their performance when it comes to eliminating impurities that lurk in the water is hard to top.


Under-kitchen sink filters are popular due to the advantages that they bring to the table. Learn what these pros are in the following lines:

  • Space-saving: As the name says, these filters must be installed under the kitchen sink. Regardless of the size and free space available in the kitchen, they make great choices as they’re very discrete, not standing in your way or catching your eye because of their positioning.
  • Superior filtration capabilities: Undoubtedly, under-sink systems deliver some of the best performances when it comes to water contaminant removal. They employ a wide range of filters that are capable of removing sediments, bacteria, dirt, and even remove unpleasant odors. Thus, you are left with great tasting and smelling water that you’ll adore drinking.
  • Easy installation: Not everyone will find installing an under-sink unit easily, but what’s certain is the fact that the procedure is a lot easier than it is with whole house models. If you’re somewhat handy you won’t find it a problem to do the procedure yourself in only a couple of hours.
  • Easy maintenance: While regular filter changes are required, it’s an easy procedure that you won’t have a hard time performing all by yourself. Best of all, there are clear installation guides that come with the filters, so even if you’re not sure about what you should do when you encounter certain aspects of the installation process, your questions will be answered quick by the guides.


The cons of installing an under-sink filtration system are:

  • They work for a single water outlet: Unfortunately, regardless of how well these filtration systems perform, they have a major downside, more precisely the fact that they only purify the water that comes from a single outlet, the kitchen sink. If you want clean water coming out of the bath sink, you must install another unit separately.
  • Water filter tap required: Most under-sink filter require the separate installation of a 3-way tap or a standard filter tap. This means that another expense must be added and that you have to throw away your old but still perfectly functioning tap.


Regardless of the type of water filter you go with, whether it be a whole house model or and under-sink one, what’s certain is the fact that the water you drink will be of a better quality. But what can’t be denied is the fact that whole house filters do provide more benefits as they ensure that clean water comes out of all the sources in your home, not being restricted to the kitchen tap. Therefore, if we were to make a concise recommendation, it would most definitely be to install a whole house filtration system.