Solar Water Heater Feature: Inner tank: Food Grade Stainless Steel by argon protect welding, supply water quality and drinkable Outer shell: Galvanized Steel coated uncorrosion layer Heat insulation layer: 50-60mm import polyurethane integral foaming Frame:Galvanized Steel coated uncorrssion layer,both install inclined and flat roof. High Pressure Cold Water In:6 bar cold water to tank from Feeder or Electric Auto Valve. Automatic Heating Element free Model Lighting () Vacumm tube Supply hot water (L/ ) 20/40" container Diameter Length No. SHDTS47/18 2.0 Φ 47mm 1500mm 18 100 60/116 SHDTS47/20 2.22 Φ 47mm 1500mm 20 111 56/108 SHDTS47/24 2.67 Φ 47mm 1500mm 24 133 47/91 SHDTS47/30 3.33 Φ 47mm 1500mm 30 166 34/65 SHDTS58/18 2.59 Φ 58mm 1800mm 18 150 41/79 SHDTS58/20 2.88 Φ 58mm 1800mm 20 165 37/71 SHDTS58/24 3.46 Φ 58mm 1800mm 24 200 32/61 SHDTS58/30 4.32 Φ 58mm 1800mm 30 250 25/48 SHDTS58/36 5.19 Φ 58mm 1800mm 36 300 20/38 your satisfy is our highest goal. I can provide pre-packaged solar water heater heating system both for DIY customer and professional installers.we have a special engineer team who can give you professional suggestions.All systems have been tested under the strict quality standards to ensure the life span of the products.The summit of our goals is to let you pay less and satisfy you more. If you have any question please contact the solar water heater expert by 86-132 7522 2828