... water tank. 2.Solar Water Heater:Vacuum tube, frame Pre-heater Soar Water Heater, vacuum solar water heater, ... pressurized solar water heater1.Pre-heating solar water heater provide heat water by a ... pipeMaterial: Copper pipeSize: 14*80*1720mmSealingSilicon gelInsulation55mm thickness polyurethane foamInstallation angle20,38,40,45Assistant tank capacity2L,5L,10L, ...