... 2008 water filter/softener FRP pressure tanks industrial 30"-63"diameter FRP water softening tank;water softener FRP tanks FRP tank for water ... treatment water softener,ion exchange,pretreatment system FRP tanksFRP tanks,operation pressure is 0.6MPA,temperature is 49C, with ... openings and side openings), 2.5’’, 4’’, 6’’, 16’’, 18’’ flange.6. Accessories: upper and under distributor, black cock, ...