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The circuit board can easily be programmed to work with any version of any previous Isobar II unit
which use 20009X231
but can also be programmed for use with "TS" softeners
Clearion 300 Series Softener and filters***
*NSF Certified to meet NSF/ANSI Standard 60 for drinking water additives
20017X284 D-15 Bypass Elbow Connectors 1" NPT Set Softener Resin The circuit board can easilyD 15 1" NPT 90 Degree bypass valve elbow connector set Compatible with: All CSI Signature 3 & 4 models. All WaterSoft Isobar 3 & 4models. All Clearion 300 & 400 series
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