Novel design tail stock. Solar water heater passed CE, EN12975, ISO9001-2008, Solar Keymark certification Solar water heater feature:1.Non-pressure system2.Inner tank material:SUS304 stainless steel,1.2mm thickness and automatic wdlding technology corrosion3.Inlet and outlet uses argon wdleing technology4.Frame materical:stainless steel,strong and against corrosion5.Novel design tail stock