split pressure solar water heater 1.CE,CCC,ISO9001 ... pipe 15 years warranty 3.delivery:15 days 4.OEM split pressure solar water heater 1. that type have CE ... ISO9001,CCC, certificates, completely guarantee high quality,2. each tube inside have copper pipe for exchange hot,high efficient,keep ... autumatic, and can work in bad weather(-30), if one tube is broken, still can work, no leak,4. collector ...