A plumbing system’s water-carrying pipes and other materials must be sturdy, corrosion-resistant, and long-lasting enough to last as long as the house in which they have been installed. Toilets, urinals, and lavatories are often built of durable porcelain or vitreous china; however, glazed cast iron, steel, or stainless steel are occasionally used. Steel, copper, brass, and plastic are common materials for water pipes. You can fix some of the most stubborn leak problems with a wrench and a few plumbing principles. Although it is evident that fixing leaks yourself saves money, you must know when to call a plumber.