Should You Install Your Whole House Water Filter Before or After the Pressure Tank?

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If you’ve decided to install a whole house water filter for your home, you’re probably already familiar with the many benefits it has to offer. However, if you also use a pressure tank in your house, you might wonder whether the filter should go before it or after.

A pressure tank or pump pressure tank helps increase the water pressure entering your home’s plumbing. It’s vital for areas where water pressure is annoyingly low, unstable, or for old homes with frequently choking pipes.

So, should you install your new whole house water filter before or after the pressure tank? Let’s find out!


Whole House Water Filter Before or After Pressure Tank?

If you search the internet for this question, you’ll find a pretty divided crowd. Half the people opt for installing the whole house filter before the pressure tank, while the other half thinks it’s better afterward.

It’s important to understand that there are merits to both approaches.

Installing the whole house water filter before the pressure tank ensures only clean water goes into the tank. This prevents sediment from entering, especially the pressure switch, ensuring a long life of the appliance.

This may also address the issue of some filters reducing water pressure because of all the filter media the water has to pass through. It’s one of the few drawbacks of such a filtration system.

On the other hand, some argue that when whole house water filtration systems get clogged, the water pressure would reduce too much and make the pump running continuously. However, that can be mitigated with a second cutout pressure switch.

Some people also argue that the pressure tank is nothing but a pipe that won’t be affected by sediment so much. Even if sediment collects, the water and dirt can be drained from the valve. Although depending on the installation, this may not be so easy.

So as it stands, installing a whole house filter before the pressure pump has more advantages.

Water Filter Cartridge

Where Should an Iron Filter be Placed?

Iron is typically a problem with well water, causing the water to turn reddish-brown. If you’re installing an iron filter, it’s best to install it after the pressure tank. This is because otherwise the iron filter may not be able to backwash adequately.

Since it requires varying pressure, installing it before the pump would not make sense. The well pump will not turn on as the pressure switch is on the side of the pressure tank.

Also, there’s a risk of the water flowing back to the filter because of the pressure. This happens if an iron filter is installed before the pressure tank.

Sediment Filters

As for sediment filters, you should definitely place them before the pressure tank. In fact, they should be the first in line, preventing sediment from entering into any other water filtration or treatment equipment you have installed (like water softeners, water heaters, etc.).

Sediment can settle at the bottom of the pressure tank, meddling with its performance over time.

When using several filters and pressure tanks, it’s best to use shut-off valves between every node. That way, you can stop a particular system whenever you need to.

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If you have any questions about installing a water filter before or after the pressure tank please don’t hesitate to leave a comment below!

About the Author Gene Fitzgerald

Gene Fitzgerald has been with BOS since the very beginning. She is head of content creation and has fully immersed herself into the home water treatment industry only to become an expert herself. Outside of BOS, Gene loves reading books on philosophy & social issues, making music, and hiking.
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