How Often Should I Replace the Filter in My Whole House Water Filter

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Taking proper care of your whole house water filter is important to keep it running smoothly for years to come. However, you might be unsure how to care for it if you have recently installed one and you may resort to the internet in hopes to know how you are supposed to change it.

A whole house water filter reduces the impurities in your drinking water and ensures its clean supply, so it is a very shrewd investment. However, with time and constant use, the efficiency of the filter system can diminish and may require replacement.

If it is your first experience with a whole house filter, it might be difficult to navigate on the internet for replacing it as different systems require different tools and have a different frequency for replacement. Therefore, researching about your filter should be the foremost thing on your checklist so that you can find an article or guide on the internet that applies to your situation.

The positive side to installing a whole house water filter is that it requires minimum maintenance over the course of its lifespan. Once it has been installed, the only maintenance is to replace the filters when required. In this article, we shall be discussing how often does your whole house water filter needs to be replaced and why it is important.

Why Is It Necessary?

Over the course of time, the constant use of filters can lead to less and less effectiveness. In order to ensure the proper functioning of these filters, they need to be replaced every now and then. After months of use, the filters can start collecting debris and become clogged. It can be difficult for water to go through the filters if they become too clogged. However, if you keep changing the filters on time, it will keep the system running smoothly and hassle-free, maintaining its peak performance.

Replacing Sediment Pre-Filter

Replacing Sediment Pre-Filter

The sediment pre-filter is the standard component in many water filter systems and usually the very first step in the filtration process. It is responsible for catching all the sediments and removing them. However, over the course of time, the sediment pre-filter can get clogged due to the accumulated dirt and debris.

It is recommended to replace this filter after every 3 to 6 months in order to prevent the clogging. You can also replace it whenever you feel like it is not functioning properly or when the color of the water changes.

Replacing Sub-Micron Post-Filter

Replacing Sub-Micron Post-Filter

The sub-micron filter ensures that water is free of any harmful microscopic particles such as harmful protozoa in the water that other filters might not have removed. It is an optional add-on, but installing a sub-micron post-filter is a very wise decision.

The filter has been made optional because these particles are not necessarily present in all kinds of water, depending on the water source. If you believe the source of your water is clean enough and does not contain any such harmful particles, you may not need this particular filter and do not have to install it.

However, it is always better to be on the safe side. Installing it in your whole house water filtration system will just be an extra step toward security and safety.

It is recommended to change this sub-micron post-filter after every 9 to 12 months.

Replacing Iron Filters

Iron filters are responsible for ensuring a proper and smooth flow of the water. They should be changed as soon as you notice a difference in the flow of water. The slow water flow hints at corrosion, which is why it is so important to replace the filter immediately. If not replaced timely, the iron can mix in the water, rendering it undrinkable.

Replacing Iron Filters

These components of your whole house water filtration system should be replaced as soon as possible to ensure the optimal performance of the system. You will have to keep a close eye on other components as well. If you notice any change in the water flow, discoloration or change in the taste of water, it is an indication for you that these components have lost their efficiency to clean water and need to be replaced.

Set a Reminder

In this fast-paced life, it is not uncommon to forget things every now and then, especially when you are already occupied with work-related stuff or other important matters. Therefore, it is always wise to have reminders regarding your house issues so as not to miss any important task around the house. This includes setting reminders for replacing filters as well.

Try out the following ways to ensure you do not forget replacing the filters for your whole house water filter:

  • Mark the calendar: Based on the given replacement time of the filters, mark the date on the calendar when you are supposed to change them and order them when the date approaches. You can save it on your phone’s calendar as it will give you a notification when the date is approaching. Marking the calendar is a great way of reminding yourself.
  • Order replacements beforehand: If you think you will forget replacing filters until the last possible second, it is better to order them or purchase them in bulk. It will spare you the hassle of remembering when to order new filters and fretting about it.


A big family of, say, eight members would obviously need to replace the components of their whole house water filter more often than a small family of three members. Therefore, it is better to set reminders according to your situation. Keep an eye on all the components of your filter system to see if they are working fine or not. If you notice any changes in the water, replace the filters to keep your water clean and free of harmful particles.

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