I hate pipe dope...

[walterjay]

I have used oakum. I comes in handy and is a great sealant.

 

[danstraylee]

Sometimes you just have to get serious, like when dealing with gasoline piping and have the EPA breathing down your neck!
I got to the point where I'd use Teflon tape, then just a bit of Teflon paste over that, worked like charm and no leaks.
No leaks, no fines!

Teflon tape is not to be used for sealing a thread. It is for lubrication of threads only. For cheap industrial and home use RectorSeal is a good choice.

In my line of work I used Deacon 375-OXP, Dapco 2200, or for surfical sealing PPG PR-1782. Anything less was just asking for trouble. I would never ever even consider thread tape for a sealing solution.

 

[Thermo1223]

Depends if the person knows how to apply it correctly. propane and natural gas can degrade Teflon over time. you have to use yellow PTFE tape which is rated for gas use. well lets clarify that oatey and hercules has a gray tape that can be used but some jurisdictions may require the yellow tape for code purposes.

I was talking to my neighbor about this and he has a few plumber friends that said they were failed on inspection for only just PTFE tape on gas inspections. They actively wanted to see both saying it was code even on flares.

 

[bullwinkle]

I use Loctite 567 on almost everything, although really bad threads can need Teflon tape too…

 

[DCDG]

I was shown by an old school plumber how to use cotton thread sealing wick. Used this method for steam and hot water hookups on old cast iron radiators to make up valve and union connections along with dope.

 

[DCDG]

I was talking to my neighbor about this and he has a few plumber friends that said they were failed on inspection for only just PTFE tape on gas inspections. They actively wanted to see both saying it was code even on flares.

I can see that happening as PTFE doesn’t do a good job at sealing it’s a better lubricant.

 

[Delta]

Not a real popular opinion, but I use tape and compound. It acts more as a lubricant to make sure you can get the fitting tight.

Although last week I was replacing a fire pump compressor at work and only had my Blue Monster tape on hand and everything went fine. That tape is pretty thick though.

 

[DCDG]

Not a real popular opinion, but I use tape and compound. It acts more as a lubricant to make sure you can get the fitting tight.

Although last week I was replacing a fire pump compressor at work and only had my Blue Monster tape on hand and everything went fine. That tape is pretty thick though.

My two must haves. Blue Monster tape and Hercules Megaloc. If you ever work on Lavatory drains the tailpiece extensions with the scratch threads this combination is a must have for a no leak assembly.

 

[Delta]

My two must haves. Blue Monster tape and Hercules Megaloc. If you ever work on Lavatory drains the tailpiece extensions with the scratch threads this combination is a must have for a no leak assembly.

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I use the Megaloc at home, at work I have some Rectorseal Tru-Blue. It's pretty darn similar.

Not too many guys at work like to do plumbing, so being the jack of all trades it gets passed on to me. Honestly, I'd rather work on a sink or toilet over a 25HP motor/gearbox!

 

[DCDG]

I use the Megaloc at home, at work I have some Rectorseal Tru-Blue. It's pretty darn similar.

Not too many guys at work like to do plumbing, so being the jack of all trades it gets passed on to me. Honestly, I'd rather work on a sink or toilet over a 25HP motor/gearbox!

Being in the same boat as you, yes it is a lot quieter and climate controlled vs an engine room with heat and decibels. laying out scrap cardboard or a moving blanket and stretching out the old back working on a sink can be a happy place on a hot summer day.

 

[Pablo]

I just changed some LP hard plumbing to add a longer line outside for my griddle. Yellow stuff works awesome. Just wish I had done the thing all in stainless. Black iron rusting like nuts.

 

[JohnnyG]

Teflon tape is not to be used for sealing a thread. It is for lubrication of threads only. For cheap industrial and home use RectorSeal is a good choice.

In my line of work I used Deacon 375-OXP, Dapco 2200, or for surfical sealing PPG PR-1782. Anything less was just asking for trouble. I would never ever even consider thread tape for a sealing solution.

You are not correct. Yes, it does have lubricant properties, since it is teflon, BUT the tape also compresses inside the sealing surfaces of the threaded joint, making a leak proof seal.