What type of pipe is approved for underground acid waste?

In plumbing systems dealing with corrosive substances, such as acid waste, the choice of pipe material is crucial for ensuring both durability and safety. The approved pipe type for underground acid waste has properties that allow it to withstand the harsh chemical environment.

Lead, silicon iron, or extra heavy salt glazed vitrified pipe is recognized for its ability to resist corrosion and deterioration when exposed to acid waste. The ceramic glazing of vitrified pipe provides a non-reactive surface that can handle the acidic components without degrading. Additionally, the heavy construction of these materials ensures they can withstand the pressures and conditions present underground.

Other materials like plastic, steel, or copper may not be suitable for this specific application. Plastic pipes can degrade when exposed to certain acids, steel is prone to corrosion, especially from acidic environments, and copper can suffer from pitting and corrosion when interacting with acidic waste. Therefore, the durability, chemical resistance, and structural integrity of the specified materials make them the appropriate choice for underground acid waste systems.