👉 A sink fluid, often referred to as drain fluid or antifreeze solution, is a specialized liquid used in plumbing systems to prevent freezing and corrosion within pipes, particularly in colder climates. This fluid typically contains a mixture of water and additives designed to lower the freezing point below that of pure water, ensuring that pipes remain fluid even at sub-zero temperatures. Additionally, it helps prevent the formation of mineral deposits and reduces the risk of pipe damage by inhibiting corrosion. When a sink is filled with this fluid, it creates a protective barrier that keeps the pipes and surrounding plumbing system operational and safe throughout the winter months.