... water heaters,solar water heater,Flat panel compact pressure systemHorizontal pressure water tank 1.Type of tank Pressurized, , working ... high-density polyurethane,27 hours heat preservationFeaturesSpecial-protection inner tank with the quality guarantee1.Rust free & scale resistance ... on the Blue -gold Titanium after baked 930 °C.Under high tepreture ,havemore performance of stability. No seaming ...