- Install a 48,000 grain metered Clack whole house water softener with by pass valves and a brine tank. Provide the first (4) bags of salt. - Install whole house arsenic reduction system with (1) cubic foot of Metsorb for reduction of type III and type IV arrsenic. In/Out Clack passive valve and by-pass valves. Clack products have a five year manufacturers warranty and our workmanship is warrantied for 90 days.