Water cools down as it moves through metal pipes primarily due to heat transfer to the surrounding environment. Metal pipes, especially if they are not insulated, conduct heat away from the water, causing it to lose thermal energy. Additionally, if the water is flowing through cooler areas or if there is a temperature gradient, it will further decrease in temperature as it moves. This process is a result of conduction and convection, where heat is transferred from the water to the metal and then potentially to the air or surrounding materials.
Copper
Salt water cause corrosion on most metal pipes.
The drain metal pipes are usually coated and galvanized because of the hard water.
Copper
some times when temperatures go really cold in winters it causes water to freeze and as the water in pipes starts to freeze, the expansion that takes place when water freezes causes pipes to break
it works because water travels up the pipes then comes out of little holes in the pipes. and a mechanism moves the pipes
Water pipes should not of themselves crack at any temperature, however if pipes have water in them the water will freeze at temperatures below 0oC. If this happens then as the water freezes it will expand (ice is less dense than water) and as it expands it will either stretch metal pipes until they burst or crack ceramic pipes. For this reason external water pipes are buried at a depth to which the frost will not penetrate and internal water pipes are lagged to keep them warm.
The reason a water pipe squeals is because of the water rubbing against the metal of the pipe.
Copper and stainless steel are commonly used for water pipes because they do not react with water, helping to prevent corrosion and contamination of the water supply.
Metal dector or just stat opening the walls
Calcium is not used as water pipes because it is a very reactive metal that easily forms compounds with oxygen and water, leading to corrosion. This corrosion can weaken the pipes and contaminate the water passing through. Therefore, materials like copper, PVC, or galvanized steel are commonly used for water pipes instead.
galvanized water lines, cast iron drain lines, sometimes lead pipes, terracotta or clay pipes, and in rare cases wooden pipes.