Pressurized solar water tank: economical and convenient for the household Pressurized solar water tank: Technical Specifications:1) Capacity: 200, 300,400,500L2) Inner ... 542,613,6133) Water tank diameter(mm): 520, 620,710,7104)Material of inner tank: BTC340RWith porcelain enamel5)Material and thickness of shell: ... ,26,2610) Material of insulating layer: polyurethane Pressurized solar water tank