Flanges are fittings that allow the attachment of accessories and other items to the pipe. They can also increase the strength of the pipe. The most common type of flange is found at the base of a toilet. Flanges are a disc-like fitting that creates a tight seal by pressing two surfaces together with bolts, clamps, edges, or a compressive force. Most flanges, however, use bolts to join the two surfaces together. PVC flanges are available with a slip or threaded ends. Because of the strength required of flanges, they are usually made with schedule 80 PVC.
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