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Q: When to use teflon tape and when to use joint compound?
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Should you use teflon tape or joint compound on male PVC fittings for a swimming pool?

Teflon tape only, no joint compound. Two or three wraps is plenty... Yes agreed, teflon tape will make it easier for repairs in the future


Should you use teflon tape with plastic to plastic threads?

Teflon tape can be used on any type of liquid joint. However, it is strictly speaking a lubricant, NOT a sealant, and is a cheap and nasty way of sealing joints. - The proper sealant for any liquid pipe joint is a pipe joint compound such as Whitlam's or Oatey's Blue Joint Compound.


Is Teflon tape sticky?

No, teflon tape is not sticky and that's for a good reason. -Most people think of teflon tape as a sealant. However it was originally intended for plumbing use as a sealant AND a lubricant so you can get a tighter connection on the pipe joint.


Which fitting requires a the use of teflon tape?

Many fittings, except unions, require the use of teflon tape.


If a new water heater has galvanized female threads which is better tape or joint compound when attaching male copper connector?

I would use teflon tape. This would possibly be help full with the electrolysis that happens with dissimilar metals in any case it would certainly not hurt.


What type of Teflon tape do you use to join steel pipe to coupler?

If you are running natural gas or propane, gas teflon tape. Otherwise, any white teflon plumbers tape is fine.


Is it importantant to use teflon tape?

Teflon tape is a staple in any plumbers tool box. The tape is water proof and does not gum up, causing problems with connection.


Can i use Teflon tape with brass fittings?

yes


Do I have to use teflon tape to prevent leaks?

There are a number of sealants available to prevent leaks in pipes. If you don't want to use teflon tape, you can use a liquid sealant which will form a seal as it dries.


How can use instead of Teflon Tape to seal the 4 threaded joint on galvanized air lines?

You can use pipe thread sealant aka "Pipe Dope" you can get this at most hardware stores.


Are there codes for teflon tape for use with methane gas?

Yes


Should you use teflon tape on an outdoor hose connection?

no.