by Francis Jock

Created on: April 25, 2009   Last Updated: April 27, 2012

Teflon tape is a plumber's first line of defense in stopping leaky pipe connections and making plumbing repairs that last. Teflon tape, which is white in appearance, doesn't gum up the threads of a plumbing connection and it doesn't' cause the pipe threads to rust two pieces of pipe into one. Teflon tape, also known as thread seal tape and plumber's tape, is the answer to every plumber's prayers for a way to make a connection more than once without screwing up the entire repair job.

Rolls of Teflon tape can be purchased at any hardware, home supply, or plumbing supply shop. It is inexpensive and indispensable for beginning and seasoned plumbers alike. Consisting of a few short yards of thin, ribbon like Teflon, it is a must-have item in every plumber's tool box and home repair person's work shop. It is strong and durable, and it effectively stops water and gas leaks around threaded pipe fittings.

The application of Teflon tape is simple and straightforward. Simply pull off enough tape from the roll to make at least three wraps around the male end threads of a pipe fitting. Always wrap the tape in the same direction as you will be tightening the connections together. Gently press the tape in place until it forms a snug sleeve over the treads. It is important to have clean hands when doing this, as any dirt or grease spread over the tape will degrade the tape and possibly result in a failed seal. You only need enough tape to wrap the threads as far as they will go into the female connection in order to make a proper, leak-proof connection.

Next, insert the male end of the pipe fitting into the attaching female end of the connection. Tighten the two connections together, being sure to never over-tighten them, and you're done. If you make a mistake, or ever have to disconnect the fittings, they will separate easily because the Teflon tape is a good lubricant that prevents the fittings from forming a corrosive bond.

Unlike other forms of tape, Teflon tape is not an adhesive tape and doesn't stick to anything. It does, however, stretch out of shape easily and tend to clump together if not handled and applied with some degree of care. All in all, it is easy to use and, more importantly, is good for preventing leaky water pipe connections.

Do not use white Teflon tape on iron pipe gas fitting as it will deteriorate and cause leaks. The proper form of tape to use for gas fittings is Yellow Teflon tape, which is a double-density and is approved of use in making iron pipe connections. Other variations occur in Teflon tape according to its density: Red Teflon tape is triple density and used in pipes 1/2 inch or more in diameter, Green Teflon tape is used for oil-free applications such as Oxygen equipment, and Copper which is used with bolts or pipe threads in mechanical equipment.

Teflon tape should be a standard item in your plumbing repair tool box. You can be sure that your plumbing repairs are leak free by following the steps above.

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