LJXH Electric Heating Tube 32mm Side Inserted Auxiliary Heater for Solar Water Heater Anti-dry Heating with Temperature Control Specifications:Product Name: Solar Electric Heating TubeVoltage: 220VPower: 1500WLive Wire: RedNull Wire: BlueEarth Wire: Yellow/GreenThread Diameter: 32mmMounting Method: Side-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 make a choice the dimensions of the electric heating tube?1) The diameter of the lowest outer hole is 55mm, please want the 47mm electric heating tube inserted at the bottom) The diameter of the lowest outer hole is 69mm, please desire the 58mm electric heating tube inserted at the bottom) If the reserved gap is under the facet of the water tank, please favor the aspect direct plug-in electrical heating tube) If there could be the 8cm flange gap at the bottom of the water tank, please want the flanged electrical heating tube. 2. How to install the plug-in electrical heating tube on the bottom?1) Take out the previous electric heating tube or the plug in 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 red cord is hooked up to the dwell wire, the blue wire is connected to the null wire, and the yellow/green cord is attached to the earth wire.