... Tube Tube in flat collector with Model HFC-2Pipe type: Heat pipe, direct-flow pipe, U pipe avaible.Reflector: CPCCertificate: Solar ... Kemark , SRCC, AS/NZ, ISO9001Gross size: 2.s.q.mConnections: 22mm cu tube, G3/4" male threadWorking pressure: 6 ... water, public center hot water, hospital, swimming pool etc. Panel heat pipe solar collector