... FRP Pressure Vessel ! Manufacturer ! Excellent quality ,Competitive Price ! FRP Pressure Vessel8" Membrane Housing for Reverse Osmosis System1) Diameter: 8" 2) length: 1 , 2 ,3 ,4 ,5,6,7 membrane ... element 3)Max working pressure ... to 120°F)8)Burst pressure :1800psi9)Operating pH range: ...