Product Details: 1. CE, ISO, SRCC,KEYMARK, CCC, SGS 2. OEM provide 3. Sample provide 2013 New Style European EN12975 and SRCC Certificated Pressuzied Solar Water Heaters (Double Coiler 150Liter) Model: SP6000 Working principle:1) When the discrepant temperature of the solar collector and the storage tank reaches the set value, the controller will start the circulation pump automatically.2) The ...