Features flood sensor with SentryPlus Alert technology to detect excessive water discharges from the relief valve;Alert features available with add-on sensor connection kit;Utilizes advanced ArmorTek coating technology to resist corrosion of internals;Cast iron body construction with patented 3-part advanced epoxy coating system designed to limit both microbial induced (MIC) and exposed metal substrate corrosion;Compact design;No special tools required for servicing;No special tools required for servicing