The removable sieve columns for the Inogen One G3 contain the sieve filters that separate inert gases from room air and concentrate it into medical-grade oxygen. Keep a pair on hand so you can replace them on schedule and keep your G3 producing the correct oxygen concentration.
Designed specifically for the Inogen One G3 portable oxygen concentrator. Not interchangeable with G4, G5, At Home, or other Inogen models.
2 sieve columns — a complete set for replacing both at once. (Sieve columns work in alternating cycles, so both should be replaced together to maintain proper oxygen output.)
Replace the columns every 12 to 18 months as a general rule.
Earlier replacement may be needed depending on operating conditions. Your G3 will alert you with the "O2 Service Soon" message on the display when the columns need attention.
Key features
- Easy to install and remove — your G3 tells you when replacement is needed
- Works on all flow settings
- Long-lasting, durable design
- Lifetime 24-hour technical support with every purchase from MCS
- Free FedEx delivery
Call 1-800-775-0942 with your G3's error code — we'll help confirm whether columns are the right replacement part.
About Main Clinic Supply
We're based in Rochester, Minnesota — home of the world-famous Mayo Clinic. We deliver free to all Mayo Clinic hospitals and local hotels. With FedEx's strong presence in Rochester, our family-owned business is able to ship late into the evening.
Inspired by Mayo Clinic's values, we prioritize helping people over making profits — embodying Dr. Mayo's 1910 mission statement: "The needs of the patient come first."

