Reinforced film-building for aggressive water.
Zinc orthophosphate pairs a zinc component with orthophosphate to accelerate and strengthen protective scale formation — a proven choice for soft, corrosive waters that resist conventional passivation.
In low-pH, low-alkalinity systems where orthophosphate alone builds film slowly, the zinc fraction gives the reaction a head start, which matters when a utility needs to move its 90th-percentile lead result before a monitoring deadline arrives. It also performs well across distribution systems with mixed pipe materials, where lead service lines, copper, and mild steel all need protection from the same feed. Systems carrying zinc limits in a wastewater discharge permit should confirm headroom first, and we factor that constraint into the program before recommending a dose.
Optimal corrosion control treatment engineered to hold lead below the new 10 ppb action level.
About Zinc Orthophosphate
When should we choose zinc orthophosphate over orthophosphate?
Soft, low-alkalinity, aggressive waters that resist conventional passivation are the usual case. The zinc component accelerates and strengthens scale formation, which helps when a system needs to establish protection quickly.
Does the zinc component affect our wastewater discharge?
Zinc will appear in your wastewater stream, so systems with zinc limits in their discharge permit should confirm headroom before switching. We factor that constraint into the program recommendation.
How fast does the protective film form?
Faster than with orthophosphate alone, which is why it is often selected when a system is working to drive its 90th percentile down before a compliance deadline.
Is this product NSF certified for drinking water?
Yes, it is certified to ANSI/NSF/CAN Standard 60 for drinking water treatment chemicals.
Was this product previously sold by Shannon Chemical?
Yes. Shannon Chemical Corporation is now a Usalco company, and this product continues to the same specification under the Usalco name.
