Often, for watering the garden, we lead the cold water installation to the outside through the building wall or the foundation. So that the installation is not damaged in case of water freezing inside, the pipe passing through the wall should be placed slightly inclined to the outside and provided with an external valve. Before winter, turn off the inner valve and unscrew the outer valve, allowing the water to flow out of that part of the pipeline, which is at risk of freezing. The pipe section in the wall does not require insulation.
