our company supply kinds of solar water heats and components with high quality and low price.If you are interesting in it ,please leave me a message. our products Designed by the standard of getting heat in winter ,Dong&＃039;ao heat-wasting restraining technology, Acceleration of hot water circulation TG technology,Pipeline is made of all red copper and conducted by heat transfer medium liquid,To save place and sample to instell,Suitable for families who can not put vacuum tubes on their roofs MSN: xxxxx