... 1 Products Description Ø Main profiles: multi-chamber structure, separate drainage chamber;Ø This system can be connected through the couplings of 90 ... c to 70 °c , with the sun, torrential rain, dry and wet changing, no discoloration, deterioration, aging, embrittlement and other ... leaving the fire,it is safe and reliable;Multi-chamber structure, high heat preservation: Heat transfer coefficient is ...