4 to 6 people are in charge. . You can just leave it during the renovation. . But if you bury the solar water pipes in the wall in advance, they will look good later. It is recommended to use better quality pipes. Additionally, a water purification device must be installed where the water enters the water heater. Otherwise, after two years of use, scale and sediment in your solar system will affect its heat output. . . I hope Er's answer is helpful to you.
Solar water heater pipeline reservation
Introduction Reserve 4 to 6 separate pipes for piping the solar water heater. . You can just leave it during the renovation. . But if you bury the solar water pipes in the wall in advance, they will look good later. It is recommended to use better quality ones