Split Chauffe-eau solaires fou home use 1. Capacity:100-500L 2. Anti-freezen& ... SRCC, Solar keymar Split Chauffe-eau solaires fou home use Pressurized Solar water heaters /Solar Collector - Swimming Pool ( ... tube is quite different. 4.Welding method:We use silver welding between the top and tube body, ... so the connection part is argent. As they use normal welding, this part is black. Silver welding ...