vacuum tube solar water heater 1.CE ,ISO9001 2.5 years guarantee,15 years ... . 3.Delivery time:within 7 days Compact non-pressurized VACUUM TUBE SOLAR WATER HEATER Own factory support: Haining deno Solar equipment Co ... and hotter. Finally, all cold water will be heated to be hot water-----Components: Main tank, vacuum tube, frame, Back up components: assistant ...