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You use it on the pipe that the union is connected to, but not on the threads of the union itself. The union seals where the two halves join and there is no liquid or gas in contact with the threaded part of the union.
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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.
Are there codes for teflon tape for use with methane gas?
Yes
Is Teflon tape use able on a fitting in a gasoline tank?
Teflon is inert to gasoline and all petroleum products. The problem with Teflon is it cold flows under pressure so that when tightened (when wrapped around your fitting) it will relax eventually and probably not seal properly. This is not something you want where gasoline can leak.
Can regular white Teflon tape be used on steam condensate drain?
Yes but it doesn't hold very long and plus you should use it what it's for. Not to be rude but problems may be caused!
Can you use victaulic coupling on natural gas?
No, many fluids and air. No approval for natural gas.
Which fitting requires a the use of teflon tape?
Many fittings, except unions, require the use of teflon tape.
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.
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.
Are there codes for teflon tape for use with methane gas?
Yes
Should you use teflon tape on an outdoor hose connection?
no.
When do I use teflon plumbing tape?
When the local codes allow its use on the piping as some codes do restrict the use of tape
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
When joining steel pipe use what?
pipe dope and teflon tape
Can you use Teflon tape on brass fittings?
Yes, but only if it is necessary.
