What Is Sealant Tape or Plumbers Tape?
The actual name for plumbers tape is polytetrafluoroethylene or PTFE tape, but you may hear other names for the product, including:
- Plumbers Tape: A common name for PTFE tape that might also refer to a metal hanger strap that plumbers use to support pipe
- Plumbing Tape or Sealant Tape: Names describing how thread-seal tape is common in plumbing work
- Teflon Tape: A reference to the trademarked brand name for the material TeflonTM, which the Chemours company owns — there’s no plumbing product branded as Teflon tape
The tape is a thin, low-friction material designed to be wrapped around the threads on a pipe when making some types of plumbing connections. It’s easy to apply tightly so it molds itself around the pipe threads. Plumbers tape doesn’t have any adhesive properties, but when you apply it to the threads correctly, it lubricates them and fills spaces between the threads, helping create a watertight connection.
While this article focuses on using plumbers tape with connections in water lines, some types of thread-seal tape are suitable for gas connections, air fittings and more.
How to Apply Plumbers Tape
When you use it the right way with the right pipe, fittings and fixtures, plumbers tape makes it easy to create watertight connections. We’ll give you general instructions for using plumbers tape or thread-seal tape, but follow the instructions for the specific products you’re working with.
Step 1: Clean the Threads on the Pipe
Clean the pipe threads thoroughly. Dirt, hard water deposits and even water keep the tape from fully conforming to the pipe threads, creating gaps that allow leaks. Wipe away any residue from the cleaning and make sure the threads are dry.
Step 2: Apply the Plumbers Tape to the Pipe Threads
Starting a couple of threads from the end of the pipe hold the end of the tape firmly on the pipe end. Wrap it in the direction the adjoining pipe or fixture turns. So, if you're holding the pipe with the threads toward you, you’re wrapping in a clockwise direction.
Step 3: Wrap the Pipe Threads With the Plumbers Tape
Pull the tape taut and begin wrapping the threads. Overlap each previous section of tape halfway or more and wrap down the length of the threads. Keep the tape taut, but not so tight the threads cut through. Wrap the tape around the threads two to four times. Don’t overwrap. Excess tape will bunch as you make the connection and the tape won’t seal properly. Cut the tape or simply snap it by pulling the roll away.
Step 4: Attach the Pipe, Fixture or Fitting and Test for Leaks
Smooth down the loose end of the plumbers tape over the threads and then screw the pipe, fixture or fitting in place. If the tape bunches up or doesn’t lay flat as you tighten the connection, remove the tape and reapply. Check the connection for leaks. Remove and reapply with an additional pass if necessary to create a watertight connection.
Finish Your Plumbing Project With Help From Lowe’s
Knowing how to use plumbing tape lets you create a watertight connection for many plumbing projects, from replacing a shower head to installing a new faucet. Wrapping the threads of the pipe just takes a few seconds but makes the connection go on smoothly and reduces the risk of leaks. Shop Lowes.com from plumbing tape as well as the fixtures and tools you need to complete your project. Or stop by your local Lowe’s, where a Red Vest associate can help you find everything you need to do your plumbing job the right way.
Plumbers Tape FAQ
What Direction Do You Wrap Plumbers Tape?
Wrap the plumbers tape in the same direction you screw on the fixture or the connecting pipe. If the end of the pipe you’re wrapping is facing you, this is a clockwise direction. Making the connection should tighten the tape against the threads rather than push it off.
When Should You Use Plumbers Tape?
Plumbers tape is typically suitable for use with iron, stainless steel and brass pipe. Common uses for plumbers tape on water lines include:
- Installing a shower head
- Connecting a valve to a threaded pipe
- Installing kitchen faucets and bathroom faucets
- Connecting some types of threaded pipe
- Making a secure connection on an exterior hose tap
- Installing some irrigation system fittings
Always follow the manufacturer’s directions for the pipe, fixture or fitting you’re installing.
When Should You Not Use Plumbers Tape?
While plumbers tape has many uses, it’s not the right solution for all pipe, fittings and fixtures. For example, plumbers tape isn’t typically suitable for use with:
- Copper pipe and fittings
- Polyvinylchloride (PVC) pipe and fittings
- PEX pipe and fittings
- Compression fittings
- Fittings with gaskets
