Sundstrom SR 221 Replacement Prefilter, 10 Pack
The SR 221 prefilter is a non-classified filter media designed to capture coarse and larger particles while extending the life of the particulate filter SR 510 and SR 710. The prefilter is placed in the prefilter holder which attaches to the particulate filter.
PKGs of 10
- Change the pre-filter SR 221 at least every 7 days.
- Change particle filter SR 510 (P100) after 18 months or sooner if there is any concern regarding physical damage, hygiene (dirt, soil) or increased breathing resistance.