TRIDENT BOILERPRO H PLUS is the perfect product to use when you want to keep your boiler system running scale free and without corrosion. This multi-functional, carbonate-based formulation contains a proven scale inhibitor that works well at higher calcium and magnesium ion concentrations. TRIDENT BOILERPRO H PLUS is especially well suited for use with hard water make-up, in low pressure heating systems and in industrial steam systems that operate at high steam pressures. The "Plus" means it also contains a steam line treatment that travels with the steam condensate and an oxygen scavenger, both of which increase the corrosion protection of your system. When you're looking for a boiler system maintainer, use TRIDENT BOILERPRO H PLUS.