Column Pair (Sieve Beds) for Inogen One G4

This is a replacement Column Pair designed for use in all Inogen One G4. These removable metal columns contain the sieve beds used, by the Inogen One G4, to convert normal air into air with high. Columns Pairs should be changed as needed -- generally every 18-24 months. A Column Pair (Sieve Bed) must always be in place when the Inogen One G4 is in use. Sieve Beds will wear down after prolonged use. In most cases G4 Column Pairs need to be replaced every 18-24 months; however in certain operating conditions earlier replacement may be required -- your G4 will let you know when it's time. USAGE: Column Pairs should only be replaced as needed. When replacement is required the Inogen One G4 will alert you to the need with a Low Priority Alert reading "Service Soon". This alert means that the columns should be replaced within 30-days. Column replacement is a simple process, that can be completed at home, without any special tools.Column Pair (Sieve Beds) for Inogen One G4