Product Intro: The pipeline is made of red copper and conducted by heat transfer medium liquid. Water can**9;t flow in vacuum tubes and operated when confined. The crust uses aluminum alloy mould material of high strength with air flow design. It is furnished in good style. Can endure high pressure when it works. Module design, optional combination, which can meet the demand of large water consumption *Material: Aluminum alloy *Solar vacuum tube with heat pipe a) Size: *8*1, **0mm b)Qty of tube: *5/ *0 /*5/ *0pcs c)Hail resistance: diameter *5mm * Insulation layer in chest a) *0mm thickness imported polyurethane, machinery overall for keeping same temperature and high pressure foam b) Heat preservation: *2 hours *Max. pressure bearing: 1.0Mpa *ISO***1/ CE certificate *3 years international responsibility for free repairing or exchange due to original quality problems 1. Manifold: red copper 2. Manifold Casing: aluminum alloy 3. Glass tube dimensions: *8mm* 1.8m / *7mm *1.5m 4. Heat preservation: *2hrs 5. Hail resistance: *5mm 6. Max pressure: *0bar 7. Working pressure: 6 bar 8. Coating of vacuum tube : SS-C/CU 9. Heat Pipe: anti-freezing > **5°C Solar vacuum tube with straight cooper heat pipe, there is anti-freeze liquid inside as medium transfering of heat. By the design the water never come into vacuum tube so the tube will never be broken in low temperature in winter. We use this type for separate pressurized system or integrative pressurized system. High quality of tri-elements as rose copper, stainless steel and aluminium nitride planting layers, heat absorption rate can reach more than *3%, certify enough power for hot water request.