LJXH 80mm Flange Bottom Inserted Solar Water Heater Electric Heating Tube 1500W Anti-dry Heating with Temperature Control Specifications:Product Name: Solar Electric Heating TubeVoltage: 220VPower: 1500WLive Wire: RedNull Wire: BlueEarth Wire: Yellow/GreenFlange Diameter: 80mmMounting Method: Bottom-mountingTube Material: Food Grade 304 Stainless SteelHandle Material: Plasticwith Temperature Control: YesAdvantages: Intelligent technology, photoelectric dual purpose, calories conservationPackage Contents: 1 x tube Notices:1. How to come to a call the size of the electrical heating tube?1) The diameter of the lowest outer gap is 55mm, please prefer the 47mm electric heating tube inserted on the bottom) The diameter of the bottom outer gap is 69mm, please favor the 58mm electric heating tube inserted on the bottom) If the reserved gap is below the side of the water tank, please favor the facet direct plug-in electrical heating tube) If there's the 8cm flange hole at the bottom of the water tank, please desire the flanged electric heating tube. 2. How to put in the plug-in electrical heating tube at the bottom?1) Take out the outdated electric heating tube or the plug within the hole;2) Apply detergent to lubricate the electrical heating tube;3) Turn the manage of the electric heating tube and gently push it into the hole;4) The crimson wire is hooked up to the reside wire, the blue cord is hooked up to the null wire, and the yellow/green cord is connected to the earth wire.