Flexible Solar Water Heater Pipe 1. Certification:ISO9001, ... and water transportation for heat and cold water, gas, solar energy, heating, air-conditioning, air-compassion, oxygen, ... : 1) Good innocuity, erosion resistance, lightness, high mechanical intensity, high heat resistance, embitterment in low temperature and long ... Pipes for water engineer in residential area. Flexible Solar Water Heater Pipe