... 5.Mainjly for electric water boilers, electric boilers, solar systems, solar water tanks, chemical tanks, bathing pool, heated ... swimming pool and other places to be. 1) Reference Voltage: 220V/380V; 2) heat pipe ... : SS304 stainless steel, SL3316 stainless steel, 10 steel, copper; 3) heat pipe diameter: Φ8.5-Φ22 ...