I have the Spiro on the boiler side of the hx, and a less expensive separator on the output side. I also have automatic air vents at all high points in my system (the Honeywell ones are about $7 at Menards). Probably overkill, but on system setup, or when I want to tinker with my system (relieve pressure first), they greatly ease getting rid of airlocks.

As to the coin vent on top of the Tarm, I installed one of those small, chrome, bathroom faucet valves which I had (better than buying yet another part) to the fitting on top of the Tarm, and then used a small piece of plastic tubing from the valve and through the vent slot on the side of the Tarm. Occasionally I will open the valve just a bit and air, if any, quickly exists with a few drops of water spilling out of the tubing, which I catch with a small container.

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The importance of air vent valves in radiators

Everything you need to know about radiators and air vents

The radiator is a heat exchanger used inside cars to cool the temperature of the cooling water leaving the engine. Usually it occurs through contact with air and, once the temperature has decreased and an adequate value has been reached, the water continues its cycle and is used again to cool the engine.

How is a radiator made?

The main body is made up of a mass formed by numerous serpentine tubes in which the engine cooling fluid flows. There are many fins to allow an effective and efficient heat exchange and a fundamental role is played by the dimensions: there is, in fact, a direct proportionality between the radiator area and the cooling obtained on the fluid contained. Furthermore, generally, there is not only one row of pipes but there are at least two rows, even if the second has a lower efficiency because the air that reaches it has already been heated by the heat exchange with the first row.

What is the air vent valve for the radiator for?

The air vent valve is a device that allows you to eliminate the air present within the circuit, which represents a possible problem for the proper functioning of the system. In fact, the problems that can be generated inside a system due to the presence of air are many and some are the following:
- Noise: it is the least important from the point of view of safety but can generate inconvenience if it is a system placed near an office or a room where people spend time. In fact, noise is not only a nuisance but can also lead to more or less serious inconveniences.
- Corrosive phenomena: corrosion is a chemical-electrolytic phenomenon in which the material will be damaged by losing part or all of its functionality. Once the corrosion has taken hold it is difficult to remedy it and, in most cases, extensive maintenance and replacement of the damaged component is required.
- Cavitation: formation of vapor bubbles inside the duct due to a localized or extensive loss of pressure, while the temperature remains substantially constant. These bubbles tend to explode and cause characteristic noises and damage to any type of material. Furthermore, they tend to form turbulence in the fluid and this generates problems related to the efficiency of the system considered.

For these and other reasons, the 04/01/

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The radiator is a heat exchanger used inside cars to cool the temperature of the cooling water leaving the engine. Usually it occurs through contact with air and, once the temperature has decreased and an adequate value has been reached, the water continues its cycle and is used again to cool the engine.The main body is made up of a mass formed by numerous serpentine tubes in which the engine cooling fluid flows. There are many fins to allow an effective and efficient heat exchange and a fundamental role is played by the dimensions: there is, in fact, a direct proportionality between the radiator area and the cooling obtained on the fluid contained. Furthermore, generally, there is not only one row of pipes but there are at least two rows, even if the second has a lower efficiency because the air that reaches it has already been heated by the heat exchange with the first row.The air vent valve is a device that allows you to eliminate the air present within the circuit, which represents a possible problem for the proper functioning of the system. In fact, the problems that can be generated inside a system due to the presence of air are many and some are the following:it is the least important from the point of view of safety but can generate inconvenience if it is a system placed near an office or a room where people spend time. In fact, noise is not only a nuisance but can also lead to more or less serious inconveniences.corrosion is a chemical-electrolytic phenomenon in which the material will be damaged by losing part or all of its functionality. Once the corrosion has taken hold it is difficult to remedy it and, in most cases, extensive maintenance and replacement of the damaged component is required.formation of vapor bubbles inside the duct due to a localized or extensive loss of pressure, while the temperature remains substantially constant. These bubbles tend to explode and cause characteristic noises and damage to any type of material. Furthermore, they tend to form turbulence in the fluid and this generates problems related to the efficiency of the system considered.For these and other reasons, the air vent valves play a very important role inside the radiators, allowing the elimination of air and allowing the system to function properly. There are numerous types of valves but the main difference depends on the type: manual, with operator intervention, or automatic, which works independently. For application in the field of radiators, the second type is preferred and used.04/01/