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The HBC-1 is a replacement cartridge for the SS-HB-1 ScaleShield. Scale shield provides superior lime and scale prevention for your tankless water heater. Protect your system from corrosion and retain the beneficial minerals in your water with the unique SS-HB-1 anti-scale hard water treatment system, and keep a replacement cartridge on hand to ensure your water quality is always up to par, for you and your pipe lines.
Scale: The SS-HB-1 ScaleShield is a hard water solution that gathers the minerals that otherwise would form on your pipes and heating elements. These unwanted minerals combine to form scale, but with the ScaleShield system, the build-up is avoided, and your water is still able to maintain the beneficial minerals without creating waste. Scale shield is an excellent choice for your scale prevention and corrosion control needs.
I installed it, and it seems to work. There's no way to really verify that things are working, but as it doesn't leak we're good.