Drain and Sewer Materials
Aboveground: Codes vary on the type of materials allowed for aboveground drain lines. The most commonly accepted materials include ABS, PVC, cast iron, and copper.
For best results, always use cast iron for drain lines that run through a living space. To save money, switch back to ABS or PVC under the house, but only cast iron will provide silent drains in the living space.
Belowground: Most building sewers and drain lines below grade are made of ABS and PVC. While both types of pipe must be cleaned before joining, ABS pipe is much more forgiving to work with in substandard conditions.
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