... )Auto-control 4) ISO 9001:2000 frp tankfrp tank with activitied carbon and sand is for water filtration and air filtration , storage ... :6“-36” linner ABS or PE ,20″-80″ 80″adopt FRP linner4) opening: 2.5“whorl,4“whorl mouth ,6″flange ... softener, household water purifier, industrial water filter, RO and UF membrane housing, RO system, Accessories (valve, distributor, tank head, etc.),OEM service ...