... ) Pressure: 0. 6mpa6) Heat preservation: 72h7) Hail resistance: 25mm8) Tube standards: 14, 16, 18, 20, 24, 30, or 36 Heat Pipes ... 58mm-1800mm or47mm-1500mm9) Manifold: outer: aluminium alloy, inner: rock wool with red copper pipework station Including: Circulating Pump, Safety valve ... about Split pressurized solar water heater solar water heating system (ISO,CE,Solar Keymark)