Abstract: A fluid injector includes a calibration filter tube including a bore defined in an axial direction through the calibration filter tube, the bore defining at least a portion of a fluid path through the fluid injector, the calibration filter tube including a plurality of holes which extend from the bore to an outer surface of the calibration filter tube. A volume reduction member has a bore though which the calibration filter tube extends, the volume reduction member occupying a space between the outer surface of the calibration filter tube and an inner surface of the tube member, the volume reduction member being constructed from resilient, compressible material. Freezing or frozen fluid disposed in the calibration filter tube expands through the holes and at least partially compresses the volume reduction member, so as to reduce fluid expansion forces damaging other components of the fluid injector.