... . Saving your bills Copper Heat Pipe Solar Hot Water Collectors Feature1. With special copper heat pipes,rapid heat transfer,more reliable,higher efficient2 ... feed, laundry and canteens 3. Agricultural sector, hatcheries and dairies 4. Boiler feed, Laundry and canteens 5. Agricultural sector, hatcheries, ... resistanceYes(≥- 40 ºC)Working pressure6 bar (90 PSI) Copper Heat Pipe Solar Hot Water Collectors