solar water tank Pressurized, connecting with existing system Prompt delivery Customized Anti-freezing, put inside house ... /φ7002.0/φ580770770197099106245454JPT2-6006000.5/φ7002.0/φ5807707702280120129214545Two copper coil inside (upper coil:100L to 500L φ12mm, thickness of 1.0mm, length ... φ19mm, thickness of 1.0mm, length of 20m;). Please contact with us.OEM service 10 Warranty 5 years for the whole ...