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The large and irregular shape prevents the screening and caking of sediment in the top several inches of the filter bed as happens in the typical sand filter
Granulated Activated Carbon can be used in upflow or downflow filters
WaterSoft Isobar 4
indicated with a blinking x 10 image
20018X231 Universal DROP Piston assembly Isobar 1 The large and irregular shapePiston assembly used on all residential DROP control valves. This piston will have a blue mark on the top of the yoke. Also compatible with: CSI Signature 4 WaterSoft Isobar 4 Clearion 400 Series Anytime you're replacing a piston, we recommend installing a new seal & spacer kit.
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