What is blue thread tape used for?

Dennis Brennecke asked, updated on July 3rd, 2021; Topic: thread seal tape
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#Thread seal tape (also known as PTFE tape, Teflon tape, or plumber's tape) is a polytetrafluoroethylene (PTFE) film tape commonly used in plumbing for sealing pipe threads. The tape is sold cut to specific widths and wound on a spool, making it easy to wind around pipe threads.

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Again, what are the different colors of Teflon tape?


  • White: used on NPT threads up to 3/8 inch.
  • Yellow: used on NPT threads 1/2 inch to 2 inch, often labeled "gas tape"
  • Pink: used on NPT threads 1/2 inch to 2 inch, safe for potable water.
  • Green: oil-free PTFE used on oxygen lines and some specific medical gasses.

Still, is it OK to use Teflon tape on propane fittings? Teflon tape for gas fittings, also known as gas-rated Teflon tape, is yellow in color and clearly states it is for gas lines and connections. The tape works on all gas line types, including butane, propane and natural gas lines.

Add on, when should you not use Teflon tape?


  • Spray Guns.
  • Pumps.
  • Parts.
  • Air Fluid Hoses.
  • Pressure Tanks.
  • Finishing Accessories.
  • Spray Systems.
  • Aluminum Air Pipe.

Does Teflon tape prevent leaks?

Connections that rely on threaded pipes and fittings are prone to leaks if they're not sealed with either Teflon tape or Teflon pipe joint compound. ... Start by wrapping the male threads with Teflon tape (Photo 1). With the end of the threaded pipe facing you as shown, wrap the plumbers tape clockwise.

14 Related Questions Answered

How many times do you wrap Teflon tape?

You always want to wrap seal tape around threaded pipe fitting in a clockwise direction. In most cases for a new joint you should apply only two or three wraps of tape. On older fitting where the threads may be damaged you may consider adding a few more wraps, but keep the number of warps to a minimum.

What can you use instead of Teflon tape?

Best Substitutes for Teflon Tape
  • Shortcomings of Teflon Tape.
  • Pipe Dope.
  • Teflon Valve Packing.
  • PTFE Pipe Thread Sealant.

Is there a difference between white and yellow Teflon tape?

The only difference between yellow PTFE (Teflon) tape for gas and the white tape for water and oil is the thickness. ... The yellow color is to indicate this tape is of the approved thickness and density but using the color yellow is not always a requirement.

Will Teflon tape hold up to gasoline?

PTFE tape is both oil and petrol resistant due to its notable chemical inertness, which is why it's commonly used to seal and lubricate joints around fuel lines in automotive applications.

What is yellow Teflon tape used for?

Yellow PTFE tape (aka Teflon) is supposed to be used for sealing gas pipe thread, and white PTFE tape, for water.

What do you use to seal propane fittings?

Begin installing the propane tank fittings by wrapping some Teflon tape around the threads of your tank. This should allow you to get a good seal on your fitting, even if the connection is slightly too large. Push the compression fitting firmly onto the tank.

What is GREY Teflon tape used for?

Raven Gray Teflon Tape is an inexpensive and effective way of sealing pipe threads joined togther for plumbing jobs. It can be used to seal water, air and gas from leaking through threaded connections.

How do you stop a Teflon tape from leaking?

Is pipe thread sealant better than Teflon tape?

Pipe joint compound is easy to find, fairly simple to use, and inexpensive. It works with all types of pipe and fitting materials, and it produces a strong seal. Pipe dope is generally stronger seal than Teflon tape, which is why plumbers and other professionals use it rather than tape for seals that are permanent.

Do water supply lines need Teflon tape?

Most faucets will have hot and cold water supply lines attached, so you just need to connect them to the appropriate water supply line. You may need to use Teflon tape (aka plumber's tape) for this part, which is used to seal and lubricate threaded pipe joints.

Is Flex Seal really that good?

β€œThat was pretty easy,” he said. Flex Seal doesn't claim to be a glue; it's a sealant. ... Flex Seal covered over the holes in the gutter well, drying to a solid rubbery finish, and it worked well there, no drips out of the sealed holes.

Does threaded PVC need Teflon tape?

Don't use Teflon tape, Teflon paste or pipe dope. ... Teflon paste and pipe dope, just like Teflon tape, make threaded joints slippery. Their use on PVC fittings can be an invitation to over-torque. When working with threaded plastic fittings do use a proper sealant.

Can you use plumbers putty instead of Teflon tape?

While a single plumbing project might call for both plumber's putty and Teflon tape, you cannot substitute one for the other. ... Teflon tape gives a reliable seal on threaded pipe joints for liquids and gases that may be under considerable pressure.

Which direction do you apply Teflon tape?

It's real important to apply your Teflon tape in a clockwise direction which coincidently is the same way you thread on most of your fittings.. If you apply the tape in an anticlockwise direction it will unravel as you screw on the fitting which will render it useless.