How to flush system after replacing water filter?

Author: Boyd Johns  |  Last update: Tuesday, June 30, 2026

VIDEO: How To Purge Air from the Water Line After Replacing the Water Filter
  1. Use a sturdy container to depress and hold the water dispenser lever for 5 seconds and then release it for 5 seconds.
  2. Repeat the process until water starts to flow at a steady pass and all the air is out of the water line.

Do I need to flush a new water filter?

Once you've installed the new water filter, you'll usually need to prepare the filter for use by flushing it out with water. Grab a sturdy container, like a large bucket, and place it under the water dispenser. Hold the dispenser pad down for five seconds, then release for an additional five seconds.

Why is my water not clear after filter change?

If you recently replaced the water filter and the water appears cloudy, it could be because of air in the water line. This is normal when using the water dispenser for the first time or after replacing the filter. Flush the water system to help remove the air from the water line.

Why is my water not working after changing water filter?

If you just replaced the water filter and don't have water from the dispenser, the reservoir tank or tubing has not filled yet. Press the dispenser for several minutes to purge air from the line and make sure all the tubing is filled with water.

How to flush water through a water filter cartridge?

Check your inlet valve for leaks and run water through the filter to a designated drain for at least five minutes. If you have a water filter equipped with more than one outlet port, be sure to run water through each of the outlet ports for a minimum of five minutes.

How To Flush A Reverse Osmosis (RO) System And Install a Membrane Flush Valve⎟LiquaGen Water

Why is the filter light still on after replacing the filter?

If you've recently replaced your refrigerator's water filter, the indicator light may remain lit until you manually reset it. Instructions for resetting the status light can vary depending on the make and model of your fridge.

How long should you run water after changing filter?

If you have a purifier or filtration system: Turn the drinking water faucet on and leave it on for 10 minutes. If you have a reverse osmosis system: Refer to our article How to Purge Your Reverse Osmosis System.

How much water to flush when changing refrigerator water filter?

Run two to four gallons of water through the new filter. This helps prevent your water dispenser from sputtering and clears impurities left over from manufacturing. Check for leaks around the filter.

How do you reset a refrigerator after changing filter?

After you change the water filter, press and hold the the RESET WATER FILTER button for 3 seconds until the red light goes off. On some models the light goes out and on others it will turn green; either is considered normal.

Why won't my water dispenser after changing the filter?

Air may be trapped in the water system after replacing the filter. Press the dispenser cradle for at least 5 minutes to purge any air from the water lines.

What to do after installing a new fridge water filter?

Once your filter is replaced, run four gallons of water through the line to properly flush the new filter, then reset the filter light.

What happens if you don't flush the fridge filter?

After periods of unuse, microorganisms can begin to grow in the filter. Flushing the filter can help reset it, but it would be best to replace the refrigerator filter to ensure that you maintain the purity of the water.

How to flush a fridge water line?

To ensure you achieve clean water lines in the fridge, you must flush them. Using a small funnel, slowly pour two to three cups of distilled white vinegar into the tube that leads to the water dispenser. Let the vinegar sit in the reservoir for five to ten minutes to thoroughly clean the system.

Why is my fridge water cloudy after changing the filter?

Observing Filtered Water That Appears Cloudy

It is possible for some air to remain in the corners of the filter housing after an installation, or especially after a filter change. This trapped air is what causes the water to have this cloudy texture or appearance which will clear up after two to three weeks.

What happens if you drink water right after changing the water filter?

Reason 1: Remove Initial Carbon Dust and Particles.

Flushing a new water filter is necessary to eliminate any initial carbon dust and particles. These impurities can accumulate during the production and packaging of the filter. If not flushed out, they can mix with your drinking water, affecting its quality and taste.

Why is water dirty after changing filter?

If your filters aren't properly rinsed, they can produce cloudy water for weeks after installation. This is due to air and loose carbon being flushed through the system. If you're experiencing this, don't worry, it's an easy fix.

What happens if you don't change water purifier filter?

The filter cartridge deteriorates over time and thus fails to properly purify the water. As a result, if you do not replace the filter cartridges as needed, the system may stop working properly. If the filter is not replaced properly, it can become a huge source of bacteria, mold, and other dangerous pollutants.

How do I know if my filter is working properly?

The most effective way to determine if your water filter is working properly is to test your water before and after it passes through your filter. Such analysis is called performance testing because it tests the effectiveness of your filter in reducing or removing potentially harmful contaminants that pass through.

Will an ice maker work without a water filter?

The short answer is not necessarily.

An ice machine will operate without a filter, but will quickly start having problems will scale buildup, especially in a city where the water is considered “hard”.

How do you flush a cartridge?

After cleaning the ink cartridge, prepare a shallow bowl of warm water. Place your cartridge nozzle-side down in the warm water (do not submerge the cartridge). After about 5 to 10 minutes, you should see ink starting to seep into the water. Completely dry the cartridge and put it back in your printer.

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