If the plumber changes his mind and unscrews the fitting, the tape should not be reused, but rather removed and a new piece used. The other type of plumber's tape is really more appropriately considered a type of strapping.
Plumbers cinch it onto all types of pipes with a series of specialized tools that allow for a tight and customized fit. It is a good choice for most pipe types, but is often best for gas connections and water heater lines that need to withstand very hot temperatures.
Both tape varieties can be purchased from any plumbing supply store, though a plumber should be sure to get the type that is best suited for the job at hand. The two can be interchangeable, but depending on the job one may be better than the other. You can find it in your local hardware store where it is usually sold in varying sizes, from small rolls to big spools. This makes PTFE tape a must-have for plumbers and anyone who does pipework jobs, such as irrigation contractors.
Every plumber worth his salt would have one of these tapes stocked in his toolkit. Interestingly enough, the manufacturer of Teflon, DuPont, has never made its product in tape form. All of these terms refer to the same product at the end of the day.
Standard PTFE tape is quite versatile and is used to seal water, gas, and air from leaking through threaded connections, most effective on high-pressure lines. However, there are also specialty thread seal tapes geared towards a specific task or need.
To make choosing a specialty thread seal tape easier, they come colour-coded for the type of application each one caters to. Generally, however, specialty thread seal tapes are much denser and thicker than the standard version. White is the standard colour for thread sealant tapes and it is recommended for basic plumbing jobs.
It is still sturdy with all the features of PTFE: high resistance to most chemicals, high resistance to extreme temperatures and can tightly seal threaded pipe connections. Colour-coded for water lines, pink thread sealants are used by pipe fitters and plumbers. As such, it is very heavy duty compared to the other standard type of tape. Yellow thread seal tape meets all gas company standards for gas lines of all types, be it butane, propane, or natural gas.
Green thread seal tapes are required for oxygen applications, as it is grease-free yet does not allow fires to start. You can extend the wrapping to the surrounding area of the pipe to make with that you have the area sealed. Pipe thread tape can last years when applied properly, but may need to be replaced after it has worn down or when you notice a leak. Silicone tape, however, is only a temporary solution. In that situation, it will only prevent a leak from getting worse, and not fix the leak completely.
Not all situations can be fixed with tape, and that is when you should bring in the professionals. At Kellermeier Plumbing, we pride ourselves on being honest and upfront with our customers and strive to provide our clients with the highest level of service.
If you need to create a watertight joint, wrapping the end of a threaded fitting with plumbers tape will ensure a tight seal. Make sure to wipe the thread clean before applying the tape, and make sure you apply it in a clockwise direction. If you wrap the tape anti-clockwise on the fitting - it will come loose when you screw on the fitting.
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