Inogen One G3 replacement column pair RP-321 — sieve bed set tool-free installation

Inogen G3 column pair — blue sticker bottom label showing correct installation orientation

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Inogen One G3 Replacement Column Pair (RP-321)

Genuine Inogen One G3 replacement column pair — the sieve beds that produce oxygen inside your concentrator.

US$118.00

In stock

Call (786) 755-8063

Genuine Inogen One G3 column pair (sieve beds)
Restores oxygen purity and clears low-oxygen warnings from worn columns
G3-specific (not for the G4, G5, Rove 4, or Rove 6)
The oxygen-producing core of your concentrator
Warranty by American Oxygen · Ships free

Genuine Inogen One G3 column pair (sieve beds)
Restores oxygen purity and clears low-oxygen warnings from worn columns
G3-specific (not for the G4, G5, Rove 4, or Rove 6)
The oxygen-producing core of your concentrator
Warranty by American Oxygen · Ships free

Genuine OEM partFree shipping on orders $99+Ships from Miami, FLExpert help · (786) 755-8063

Secure checkout · financing available

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Brand: Inogen
SKU: RP-321
Category: Column Pair

In short

The oxygen engine of your G3

The RP-321 is the genuine Inogen One G3 column pair — the molecular-sieve beds that produce oxygen inside the concentrator. Replace them when oxygen purity drops or the G3 signals low oxygen despite clean filters, typically after several years of use. G3-only — it does not fit the G4, G5, or Rove models.

The sieve columns are where your concentrator actually produces oxygen. Over time the sieve material wears and purity drops — a fresh, genuine set restores oxygen output and clears low-oxygen warnings caused by tired columns.

✅ Inogen One G3 ❌ Not for the G4, G5, Rove 4, or Rove 6 (each uses a different column pair)

Shop the compatible concentrator: Inogen One G3

Restores oxygen purity

Fresh sieve beds bring output back to spec and clear the low-oxygen warnings caused by worn columns.

Genuine Inogen part

Made to the exact Inogen One G3 spec, so the sieve material and fit perform as designed.

Warranty by American Oxygen

Backed by American Oxygen — up to a one-year warranty on sieve beds. Ask us for the current term.

Details

What's included

One genuine Inogen One G3 column pair (two matched sieve beds). Filters, chargers, and other parts are sold separately.

Why genuine matters

Genuine columns use the correct molecular-sieve material and seat precisely, so oxygen purity comes back to spec and airflow isn't restricted. Off-brand or poorly matched columns can under-perform, wear faster, or keep the low-oxygen alarm on. Every set is backed by a warranty by American Oxygen — ask us for the current term.

Frequently asked questions

What are sieve columns (sieve beds)?

They're the molecular-sieve cartridges inside your concentrator that strip nitrogen out of the air and deliver concentrated oxygen. They're the most important wear part — when the sieve material tires, oxygen purity drops.

When should I replace them, and what are the warning signs?

There's no fixed schedule published by the manufacturer. Replace the columns when oxygen purity falls or the G3 shows a low-oxygen indicator that keeps returning after you've cleaned or replaced the filters — typically after several years of use, sooner with heavy daily use or dusty and pet environments.

Is this a DIY job or does it need a technician?

Replacing sieve columns is more involved than a filter change. Some owners replace the columns themselves; others prefer we handle it. If you're unsure, call us at (786) 755-8063 — we can walk you through it or service the unit for you.

Does it fit the G4, G5, or Rove models?

No. The RP-321 is G3-specific. The G4, G5, Rove 4, and Rove 6 each use their own column pair.

Is it genuine, and what warranty comes with it?

Yes — it's a genuine Inogen column set. It's backed by a warranty by American Oxygen (up to one year on sieve beds). Contact us for the current warranty term.