Pressurized solar tank with double coil,passed CE certificate,SUS304/SUS316 inner tank,5years warranty,15years life Pressurized solar tank with one coil (NCSTII) is for solar heat close ... are 0.9MPA.6.Tank include P/T valve,Magnesium Anode,and 1500W electrical heatering element as back up. CE certificate Pressurized Solar water Tank