Inogen One G3 replacement column pair (1-4 setting)

by Inogen

Inogen One G3 replacement column pair (1-4 setting)

The Inogen One G3 replacement column pair (1-4 setting) is a replacement sieve bed for the Inogen G3 mobile concentrator. More exactly, there are 2 column pair versions for InogenOne G3 POCs. The older devices use Standard Column Pairs (Part RP-320) and come with flow settings from 1-4. On the other hand, the newer devices use "High Flow" Column Pairs (Part RP-321) and come with flow settings from 1-5.

Please note that this accessory product is only compatible if your Inogen G3 has flow settings 1-4.

Even though these products are almost identical, there are several features that differentiate them. Let’s take a look at the specifics of the Inogen One G3 replacement column pair (1-4 setting).

Key Features

  • Two metal column sieve beds
  • 2" Wide x 2" Long x 5" High
  • Each column weighs 10 ounces
  • Should be changed every 12-18 months
  • No tools are required for replacement
  • Only compatible with the InogenOne G3 that includes 1-4 flow settings
  • FAA Approved

The Inogen One G3 Oxygen Concentrator is intended for patients who require supplemental oxygen. The main function of the sieve beds is to convert the air with low oxygen level into medical grade oxygen level. Furthermore, in order to maximize the life of the unit, the user needs to take care of the columns’ lifetime. More specifically, he/she needs to replace them after every 12-18 months.


As mentioned above, even though there are two different devices: older and newer ones, there are compatible metal columns for each of them. When it comes to flow settings from 1-4, the devices require the RP-320 part.

To distinguish the RP-320 and RP-321, a user can spot several differences between these two products. For instance, the RP-321 model includes the HF (which stands for High Flow) in the column serial number. Next, the base of each column of this model usually comes with a blue sticker.

The RP-320 Standard Column pairs usually come with black/white dust covers. On the other hand, the High Flow model comes with orange ones.


The most important thing regarding this issue is that the metal column sieve beds need to be replaced only when it is needed. The column change instructions are not intended for practice purpose, but need to be used only when maintenance is required. Usually, maintenance is required within 30 days.

When the time comes, the device monitors a low priority alert which is accompanied by a double beep and a solid red light. The message which is intended for changing the column sieve beds is: O2 Service Soon. In order to silence this message, the user needs to hold the light button for 3 seconds and the notification will be silenced for 72 hours.

The Inogen One G3 Column Change Procedure

In order to change the metal columns of the device, the user needs to shut down the whole concentrator. Next, he/she needs to remove the concentrator from the carry bag and the battery from the concentrator.

Once the device is turned upside down, the user can spot the metal tubes (two columns) on the concentrator. More exactly, one is located at each side of the device. Each column can be extracted by simply pressing the latch button with a finger. Using the other hand, while pressing the button, the metal tube can be removed completely.

Once the columns are completely removed, it is time to place the new ones. The new columns come with dust caps which need to be removed. Consequently, the metal tubes need to be cleaned of any excess dust or debris. An important note regarding this issue is that the tubes must not be left exposed. Instead, you need to insert them into the concentrator as soon as you remove the dust caps. The tubes are fully seated when the spring loaded latch button is fully returned to the closed position.

Once the new metal tubes are placed, the next step is to connect the device to the AC power supply cord. If you have done each step correctly, you need to press the light button for 10 seconds, and a “sieve reset” message will appear on the screen display. When you press the bell button, a “sieve reset successful” message will be displayed.

Always be certain to use the columns which are specified in the user manual. In case of using non-specified metal tubes, the user may face several problems. For example, this may create a safety hazard and impair equipment performance. In any case, the warranty will be declared as invalid.

In order to get any additional information on the Inogen One G3 replacement column pair (1-4 setting), feel free to contact us at any time as you please. You are free to do that by reaching out to us at or by simply giving us a call at 1-800-314-8225.