How long should you flush a new water filter?

Author: Mr. Heber Corwin  |  Last update: Monday, April 6, 2026

Allow water to flow through the new filters for a minimum of five minutes to flush any air and loose carbon fines from the filter. You can connect a drainage hose to the system and divert the flushed water to a drain or a sink.

Do new water filters need to be flushed?

Once you've installed the new water filter, you'll usually need to prepare the filter for use by flushing it out with water.

How much water do I need to flush with a new 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.

How to flush system after replacing water filter?

Use a sturdy container to depress and hold the water dispenser lever for 5 seconds and then release it for 5 seconds. Repeat the process until water starts to flow at a steady pass and all the air is out of the water line. You may discard up to 4 gallons of water during this process.

What happens if you don't flush water filter?

Potential Risks and Hazards of Dirty Filters

A dirty filter can harbor harmful bacteria, mold, and other harmful particulates, which may then be introduced into your water and ice. This can lead to illness and a generally poor taste and smell in your water supply.

Refrigerator Water Filter vs. Reverse Osmosis: Which Provides Cleaner Water?

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.

How long should I let water run after changing the 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 should I discard after changing water filter?

Push the filter in until the eject button pops back out. Once your filter is replaced, run four gallons of water through the line to properly flush the new filter.

Why is my 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.

How long to flush RO system after filter change?

To flush the system, open the faucet and allow the water to run for 30 minutes. This will flush the new filters of any loose filter media. It's normal for your water to have a slight gray tint during this process and will go away.

How do I prepare my new water filter?

With clean hands, hold filter under cold, running tap water for 15 seconds. Insert filter into reservoir by lining up groove in filter with ridge in reservoir. Press firmly for a tight seal. *Do not wash in dishwasher.

What happens if you leave water filter in too long?

Health Risks: Drinking from an old filter can expose individuals to harmful chemicals and heavy metals that the filter was initially designed to remove. This can lead to health issues, especially in vulnerable populations like pregnant women, children, and the elderly.

Can you use a new water filter right away?

It's generally recommended to run water through the refrigerator's new water filter for a few minutes after installation. This helps to flush out any potential carbon fines or air bubbles that might be present in the filter.

How do you flush 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 much water should you run through a new filter before drinking?

You should always flush out three to five gallons of water before drinking the water or using the ice from the refrigerator, regardless what brand of refrigerator or water filter you use.

How long should you run a water filter before using it?

All Fluoride removal cartridges MUST be FLUSHED with flowing water inside your water filter for 10 minutes minimum with NO other cartridges installed before use. Note: Your Fluoride Removal Cartridge is usually installed in positions 1 or 2 in your water filter.

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.

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.

What happens if you never change water filter?

An unchanged water filter can produce water with a foul odour or a strange taste. A dirty or clogged water filter can also affect the mechanical actions within your refrigerator, such as the Ice dispenser. A refrigerator with a water dispensing function is a significant investment and really should be treated as such.

What to do after installing a water filter?

Make sure you flush the line after changing the water filter to avoid problems with sediment, rust or backflow.

How much water should you drain after changing filter?

The water will probably look cloudy and may have small carbon particles. This is normal and why you should flush your water filter before use. You can pour the water directly down the drain. It usually takes 3 to 5 gallons of water to completely flush your new water filter.

What are the disadvantages of drinking filtered water?

Although filters can be helpful in removing harmful chemicals from our water, they sometimes strip away beneficial minerals too. These include magnesium and calcium, as well as iron and manganese, which are eliminated to make water softer and prevent discolouration, respectively.

How long can you leave water in a water filter?

Ideally, you should drink filtered water within a few days of filtering it. However, it can be stored for up to six months. Just be sure to keep it in a clean, covered container in the fridge.

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