How many times must a propane tank be purged if contamination or trapped air is suspected?

The need to purge a propane tank multiple times is crucial when contamination or trapped air is suspected. Purging is the process of removing contaminants, such as moisture, dirt, or air, that can compromise the quality of the propane and the integrity of the system.

Purging a tank at least three times ensures that any potential contaminants are thoroughly eliminated. Each purging cycle helps to displace any unwanted materials present in the tank. The first purging removes the majority of contaminants, while the subsequent purges ensure that residual contaminants are also cleared. This methodical approach increases the chances of achieving a cleaner tank that will function properly and safely.

Purging only once may not be sufficient, as it could leave behind contaminants that can affect the propane's performance. Similarly, purging at least twice may not fully address the issue, as persistent contaminants could remain. Therefore, multiple purges, particularly at least three, provide a more reliable method for ensuring the system is clear of any unwanted substances, enhancing safety and performance for the propane system.