Personal Ambulatory Oxygen System
Provider Technical Manual
45
PN 20631679 Rev D
2. Unscrew the wing nut that holds the HEPA filter.
Figure 20: Wing Nut.
3. Unscrew the Clear HEPA filter and discard filter & small o-ring.
Figure 21: Unscrewing the HEPA Filter.
4. Install the new small o-ring and HEPA filter.
Figure 22: Installing the new HEPA Filter.
