10 Best Steam Radiator Air Valves – Buying Guides & Reviews

Steam radiator air valve is a device that allows you to manually control the amount of air flow into your steam radiators.  It is used as a way to regulate the temperature in your home, because it has been found that too much or too little air flowing into the radiators can cause them to either overheat or freeze up. The Steam Radiator Air Valve is available for purchase online and at many hardware stores, and installation typically takes about an hour with basic tools.

We have listed some best steam radiator vents on the market below to make it more convenient for you.

Best Steam Radiator Air Vents for Home and Office


Varivalve 925005-00 Angle Steam Radiator Air Vent

The VARI-Valve is a 90° angle style radiator air vent that is designed to allow for the quick expulsion of hot steam into the atmosphere. It features 1/8″ pipe thread, which allows you to screw it onto a radiator or other faucet. The VARI-Valve also provides a means for air to be driven out of the radiator as steam enters, allowing main lines to fill quicker and reducing back pressure on your home’s plumbing system.

What makes this product unique is its quiet operation– there are no clicks or hissing noises when opening or closing thanks to its innovative design. In addition, it features an adjustable setting that enables you to regulate how much water can enter your radiator at any given time. Last but not least, this product is made of quality metal materials that are impervious to corrosion and rust, which ensures that you will enjoy your VARI-Valve for many years to come.


EZ Flow 20378 Air valve Radiator Angle

EZ Flow Air valve Radiator Angle is designed to be a low-cost, easy to install and simple operation. The angle MIP of 1/8″ make the installation process quick and efficient.

The maximum pressure 10 psi ensures that radiator will not burst under high pressure while still providing a maximum operating pressure of 1-1/2 psi for the perfect fit on steam while also being quiet in operation.

This would be perfect replacement for any home looking to get more life out of their current radiator set.


Hoffman Steam Angle Steam Radiator Air Valve

The Hoffman’s Angle Steam Radiator Air Valve is a non-vacuum Air Valve with one single non-adjustable port. It has an angle connection on the side of the valve, which is made out of brass and measures 1/8″ NPT. The maximum operating pressure for this valve is 6 psig (0.4 bar).

The Hoffman’s Angle Steam Radiator Air Valve does not come with any other features aside from those mentioned above, but it achieves its purpose well and will be a great addition to your radiator or boiler system if you’re in need of a new air valve!


MAID O'MIST Adjustable Angle Steam Valve

MAID O’MIST Adjustable Angle Steam Valve is a top quality and durable product. It has an adjustable angle steam valve and five different easily switchable orifices. This makes it perfect for any room, no matter how big or small. The vent port size is also adjustable, making it perfect for any climate. The valve vents the air quickly and quietly, and then snaps shut. There is no air left in the radiator and no moist air hissing out as it closes.


Howplumb Adjustable Steam Heat Radiator Air Vent

This 10 pack of adjustable radiator air valves will allow you to control the flow of hot or cold air into your home so that you can regulate the temperature as needed. The valve has an angle MIP and will rotate 360 degrees on its stem. It also comes with two 1/8″ male pipe thread unions, making it easy to connect hoses and other types of piping if desired. Maximum pressure for this product is 10 PSI while minimum operating pressure is 1-1/2 PSI.


Midline Valve 6J3I5-5 Steam Radiator Air Vent - Pack of 5 Valves

This Midline steam radiator valve is a remarkable product that will make your life simpler. It’s equipped with two valves for maximum efficiency and comes in chrome plated steel to resist corrosion, rust, and pressure. The valve is adjustable so you can control the temperature of your radiator system easily.

This air valve also features an elegant design that will look great in any room or space, no matter how tight it may be because of its dainty size. The venting system automates itself so there is no need for manual intervention!


Superlin Main Line Radiator Steam Air Valve

With its 3/4 inch x 1/2 inch size, this valve will quickly vent air from your main line without any problems. It also has two features that make it even more useful: one is that it can be used with any type of pipe, and the other is that when installed properly, there are no leaks or drips around the area. If you want a product that will last for years and save you money on repairs too, then you should get this!


EZ-FLO 20371 Radiator Air Valve

EZ-FLO Radiator Air Valve is an air valve made of brass and nickel-plated for a long lasting durability. It is intended for irrigation purposes only, not to be used at drinking water applications. This valve has a maximum operating pressure of 5 PSI and overall max pressure of 10 PSI. This valve also has a 1/8″ Angle MIP connection and UPC and CSA certification. 


Hoffman's 401422 Adjustable Angle Steam Radiator Air Valve

If you have a radiator valve that’s not working, or if your valves are difficult to operate, the Hoffman’s Adjustable Angle Steam Radiator Air Valve is perfect for you. This air valve features six different venting settings from slow to fast and has an adjustable port for true proportional venting. The air valve is non-vacuum with a float-type vent that can be adjusted to work with any steam system.

The maximum operating pressure is 1 1/2 PSIG. The angle connection has a maximum operating pressure of 1 1/2 PSIG and an adjustable port for true proportional venting. This air valve can easily replace any steam radiator air valve with the same features as the one being replaced.


Vent-Rite Adjustable 1/8 Inch Angle Steam Vent

The vent-rite 1 adjustable steam vent can be used for a wide variety of applications. It features a self bleeding valve that eliminates the need for periodic maintenance on your part and has an adjustable venting system with three different settings to select from.

The 1 setting is essentially closed, and you can select any setting through 3 before the venting is equivalent to the Hoffman setting of 1. The flow control knob really works well, and this a self-bleeding valve which eliminates the need for periodic maintenance on your part.

Buying Guides: Important Facts to Consider Buying Steam Radiator Air Valves

Steam radiator air valves are a necessary part of any steam heating system. In this article, we will be discussing the importance of how to properly install and maintain them in your home.

Steam is the most popular method for providing heat to homes because it can provide consistent warmth without having to rely on electric or gas power. Steam radiators are connected through pipes to an external boiler which heats up water until it reaches its boiling point, turning into steam that then travels through pipes into the various rooms of your house where it eventually cools down and returns back into liquid form before being recirculated back to the boiler again. The issue with this system is that if not enough air gets through the radiator valve, there will be too much moisture inside leading to the formation of rust and corrosion.

This is why it is important to have functioning radiator air valves in your home as they allow for a regulated flow of air which helps to prevent any moisture build-up. Not only will this help to keep your radiators in good condition, but it will also improve the overall efficiency of your heating system which will help to lower your heating bills throughout the year.

Here are some factors to consider before choosing the right radiator air valves for your home:

The Size of The Valve

It is important to make sure that you get a valve that is the correct size for your radiators. A valve that is too big will allow for a large amount of air to escape which in turn results in a lower heating efficiency. This could end up costing you more money if your heating bills are higher throughout the winter months.

Type of valve

There are different types of valves available, so it is important to choose the one that will work best with your system. There are manual valves which require you to open and close them yourself, automatic valves which open and close based on the temperature of the room, and thermostatic valves which automatically adjust the amount of air that flows through the radiator in order to maintain a consistent temperature.

Installation Process

It is important to have a professional install your radiator air valves as they need to be fitted correctly in order to function properly. If not installed properly, the valve could end up leaking and causing damage to your radiator. Some valves are easy to install. You can install them yourself by following installation manual that comes with the valve.


We recommend getting valves made of brass as they are the most resilient and long lasting of the available options.


It is important to get a valve that fits within your budget, but it is also vital to not go below a certain price point as this could mean that you are getting an inferior product. If you want to make sure you are getting the best possible product for the lowest possible price, you can check our above mention listing.

Frequently Asked Question for Steam Radiator Air Valves

Should steam radiator vent be open or closed?

The answer to this question will depend on a number of factors, including the overall condition of the radiator and what type it is. In most cases, steam radiators will need to be vented into your home because fresh air circulating from outside is necessary to ensure that the cooling system remains effective. However, there are certain types of radiators that may work better without ventilation. In these cases, close the vent only after confirming with an expert. Besides being dangerous in some cases, leaving a faulty radiator open can cause moisture problems and lead to decay or mold growth inside your home even faster than if it were closed.

The best way to determine whether or not to open your radiator’s vent is to consult with a professional about the specific type of radiator you have.

How does a steam radiator air valve work?

A steam radiator air valve works by serving as the central route that controls the amount of water in the system at any given time.

An air valve can be specifically set to either allow for automatic adjustments to hot water supply, or manual adjustments which need human intervention. They regulate how much “fresh” dry steam is entering into the boiler versus how much “wet” saturated steam should exit from it. This determines what pressure will exist in your system and consequently what pressure your boiler should be set at depending on your altitude.

How do you adjust a steam vent on a radiator?

Usually, there should be a knob or small lever that adjusts the temperature setting. It’s usually found to the left of the radiator and should be turned clockwise to make it hotter and counterclockwise to make it colder.

If your air vents are set too high (or too low), you’ll end up with only hot (or only cold) air coming out – nothing good. The way around this is to install an electric fan can help push room air through the radiators for you, thereby distributing warmth more evenly throughout the space. These, like their enameled cousins (that we all grew up calling “radiators”), will work better if they’re properly designed and sized for your space rather than just taking one off someone’s garage wall and hoping for the best.