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Also used with the D-HPS DROP Home Protection Valve
WaterSoft Isobar 4
This check valve can be rebuilt & reused simply by replacing the internal duck bill
Granulated Activated Carbon can be used in upflow or downflow filters
20018X231 Universal DROP Piston assembly Isobar 1 Also used with the D-HPSPiston 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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