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In medical air piping systems, separating the piping at the filters is crucial for maintaining the integrity and quality of the medical air delivered to various medical equipment and facilities. Filtration is essential to ensure that any particulate contaminants, moisture, or other impurities are removed from the air before it is supplied to the medical gas system. When different operational pressures are required, proper separation at this point helps maintain the desired pressure levels while also ensuring that the air remains clean and safe for patient use.

Placing the separation near the medical air sources could potentially introduce unfiltered air into the system, which could compromise its quality. Similarly, separating before entering patient areas could risk delivering substandard air to critical areas where it is vital for patient health. Lastly, separating after the oxygen tanks does not allow for adequate filtration before the medical air distribution and could lead to pressure inconsistencies.

Thus, the best practice is to separate the piping at the filters to ensure that the medical air provided is not only of the right pressure but also meets the stringent quality standards required for healthcare environments.