20922C203 Piston Assy. - Isobar 1 Filter - Orange Cap (Old Style) Sidewindr Any CSI Sidekick

Any CSI Sidekick

with a filtration level of 10 microns (nominal)

Simply hang the Oxy-03 on your filter's pre-mounted bracket

This kit will replace all of the electrical components of any Signature II softener or filter

and Isobar 4

20922C203 Piston Assy. - Isobar 1 Filter - Orange Cap (Old Style) Sidewindr Any CSI SidekickReplacement piston assembly for WaterSoft Isobar 1 filter control valves manufactured prior to 2010. If you aren't sure how old yours is, take off the back cover and look at the color of the piston cap (also called the "end plug"). If your filter has an orange cap like this one, then you need to use this piston. If your piston has a White Cap, you need the 20561X254 If your piston has a Black Cap, you need the 20562X254 Note: We recommend installing a