Pentair · spa filter
Dynamic Series IV DSF / DFML-25C
- Brand
- Pentair
- Series
- Dynamic Series IV
- Model
- DSF / DFML-25C
Also labeled: DSF25C, DSF-25C, DFML25C, DFML-25C.
The DSF / DFML-25C application appears as either one cartridge or a two-cartridge pair. Confirm the installed count first.
Find the right replacement path
How many cartridges does your filter use?
Choose the answer you can confirm from the filter or old cartridge.
Your replacement path
PRB25SF single
- Applies when
- The filter uses one cartridge.
- Outside diameter
- 5 in
- Cartridge length
- 6 5/8 in
- Bottom opening
- 2 1/8 in
This identifies the compatible profile. Confirm the printed part number when available before ordering.
Your replacement path
PRB25SF pair
- Applies when
- The filter uses two cartridges.
- Outside diameter
- 5 in
- Cartridge length
- 6 5/8 in
- Bottom opening
- 2 1/8 in
This identifies the compatible profile. Confirm the printed part number when available before ordering.
Not sure yet
Check these details before choosing
- Confirm whether the filter uses one 6⅝-inch cartridge or a two-cartridge pair.
- Use the number printed on the old cartridge when available.
Do not choose a replacement until one path can be confirmed.
Sources and review date
Record reviewed 2026-07-26.