The 20001X231 Piston Assembly is a high-quality replacement component designed to maintain the optimal performance and extend the life of your water softeners and filtration systems. Built with durable materials for long-lasting reliability, this piston and end plug assembly is compatible with CSI Signature Series 1, 2, and 3, as well as Watersoft Isobar Series 2 and 3 softeners and filters.

Important Compatibility Note:

This piston assembly is not compatible with CSI Nitro Filters or Watersoft Centuri Filters manufactured after June 1, 2015. For those models, please use part number 20009X231 instead.

For best results and enhanced system performance, it is highly recommended to replace the seal and spacer kit at the time of piston installation.

Key Features:

• Durable Construction: Built for long-term performance and reliability.

• Compatibility: Fits CSI Signature 1, 2, and 3 softeners and filters.*

• Additional Compatibility: Works with Watersoft Isobar 2 and 3 systems.**

• System Efficiency: Helps maintain water softener and filter efficiency.

• Maintenance Solution: Ideal for regular system maintenance and ensuring long service life.

• Easy Installation: Designed for straightforward, hassle-free replacement.