Prystene Tankless Water Heater Descaler

Restores hot water pressure and heating efficiency. Dissolves limescale, calcium, and mineral buildup that slows your tankless water heater — restoring strong water pressure, faster heating, and lower energy bills with a single annual flush.

• Safe for your system and your family: Food-grade citric and lactic acid formula — no harsh chemicals, fully biodegradable, and safe for copper, stainless steel, and all internal plumbing components.
• Simple one-step process: One treatment handles most standard tankless heaters. Circulate through your flush kit for 45–60 minutes — no special skills required.
• Compatible with all major brands: Navien, Rinnai, Rheem, Noritz, Bosch, EcoSmart, Eccotemp, Takagi, and all other tankless water heater systems. Annual descaling recommended, especially in hard water areas.
• Professional grade, made in the USA. Trusted by homeowners, plumbers, and property managers. Same formula, available in liquid or powder — pick whichever's easier to store and use.