... .certificat;CCC,CE,SK, SRCC,ISO 4,Delivery:15 days solar energy collector with heat pipe approved by ISO,CCC,CE ,SK ... ,SRCCSOLAR COLLECTOR FEATURE:1. Pressurized solar collector with SK and SRCC certificate.2. Special high quality Insulated material to reducing the heat ... water quality, it doesn't suit hard water. 6) It can be still operate in the event of occasional tube breakages solar energy ...