How to Change the Non-Return Valve in a Kitchen Hood

The hood is an electrical kitchen appliance, complementary to the stove. Its role is to suck up and filter grease and odours. The air freed from impurities is then evacuated from the hood through the exhaust duct through the non-return valve.

The non-return valve has the role of preventing the exhausted air from returning to the interior of the room when the hood is not working.

After a long period of use, it may happen that this part no longer performs its function correctly. This can result in odors that remain permanently in the kitchen and even in other rooms of the house. When this happens, it needs to be replaced.

Since the operation is simple, you can do it by yourself.

The non-return valve is located above where the exhaust duct connects. To access it, you must remove the hood.

A non-return valve, also known as a check valve or one-way valve, is an integral component of a kitchen hood. This valve prevents backflow, ensuring that the air extracted from your kitchen doesn’t return back into the room. Over time, the valve may become damaged or less effective, requiring replacement. In this article, we’ll guide you through the steps needed to change the non-return valve in your kitchen hood.

Tools and Supplies

Before you start, you’ll need a few essential tools and supplies:

1. A replacement non-return valve. It’s crucial to choose a valve that’s compatible with your range hood model. You may need to check with the manufacturer or your hood’s manual to ensure you have the right part.
2. A screwdriver, usually a Phillips or flat-head, depending on your hood’s design.
3. Work gloves to protect your hands.

Steps to Replace the Non-Return Valve

1. Safety First: Before beginning, ensure you’ve turned off and unplugged the hood to avoid any risk of electric shock.
2. Access the Non-Return Valve: The non-return valve is usually located at the outlet of the hood, where the hood connects to the ductwork. You may need to remove some panels or covers to get to it. This typically involves unscrewing a few screws. Always refer to your hood’s manual for specific instructions.
3. Remove the Old Valve: Once you’ve located the valve, you’ll need to remove it. This usually involves unscrewing the valve from the hood or ductwork. Some models may have a valve that simply slides or snaps out.
4. Install the New Valve: Once the old valve is removed, take your new valve and install it in the same position. Make sure it’s securely fastened and that it’s oriented in the correct direction for airflow.
5. Reassemble the Hood: Once the new valve is securely in place, you can reassemble any covers or panels you removed. Be sure everything is securely fastened.
6. Test the Hood: Plug the hood back in and turn it on to test it. The air should flow smoothly out of the hood and through the ductwork, without returning back into the kitchen.

In conclusion, while replacing the non-return valve in a kitchen hood might seem like a daunting task, it’s quite doable with the right tools and some patience. Just remember to follow all safety precautions and consult your hood’s manual for specific instructions. If you’re uncomfortable doing it yourself or if your hood is under warranty, don’t hesitate to contact a professional for help.