Pressurized solar water tank: economical and convenient for the household Pressurized solar water tank: Technical Specifications:1) Capacity: 200, 300,400,500L2) Inner vessel diameter(mm): 438, 542,613,6133) Water tank diameter(mm): 520, 620,710,7104)Material of inner tank: BTC340RWith porcelain enamel5)Material and thickness of shell:galvanized sheet 0.5mm6) Thickness of inner tank(mm): 2.0, 2.0 ...