ASME Section IV capacity certified bronze safety relief valve for protection of hot water heating boilers, systems, and similar equipment. It can be pre-set to any pressure ranging between 20 to 80 psig (1.4 - 5.5 bar) at 250°F (121°C) max. AMSE Section IV certified capacity. Corrosion resistant construction. Optional polished or satin chrome finish. Made in the USA.