Abstract: A filter cartridge centering device and method are provided for centering a filter cartridge within a filter canister. The device includes a flexible elongate strap having a strap portion with a series of ratchet teeth formed near a first end and an enlarged head portion formed at a second end. The head portion contains an aperture and a pawl that cooperates with the ratchet teeth to prevent removal of the strap portion from the aperture. A plurality of flexible fingers extend generally perpendicularly from the strap portion at spaced locations along a length of the strap portion. The flexible fingers are arranged to extend radially outwardly from the filter cartridge to engage an inner wall of the filter canister to center the filter cartridge within the canister.