Compressed air fittings are not the same as compression fittings.
Tape or dope should be used for all fittings for ease of proper assembly. The joint won't seal unless it's tight, and the tape or dope reduces friction, making it easier to get the joint tight. And it's pretty much mandatory for anything that might be disassembled later.
I don't see any need for tape or dope on compression fittings. Non-compression fittings need tape or dope regardless of what they are made of?
I'm not a plumber though, but thats my take.
I got a kick out of that. I was picturing the process of pushing the tape into the threads with out pulling it out. LOL
Tape is easily removed, usually, without a wire brush. Just unwrap it.
Ok, that's enough information for me. I've used Teflon tape on plumbing joints before, so I'll pick up some of the yellow version. Just for interest's sake, I bought the Dewalt D55141 compressor you told me about. Haven't run it yet because I was waiting for an order of hose and fittings to come in which just did. I'll pick up the tape this weekend and let you know how loud this 85db compressor sounds compared to the old one that I'm giving to a friend.
Do you know if the yellow version tape will do double duty on regular plumbing fixtures? ~ not a money thing, just a convenience if it will work.
Ah, you mean Teflon tape. Plumbers tape (for us old farts) refers to the metal strapping used to hang pipe.
Teflon tape or dope never hurts (well, for NatGas, use tape/dope designed for the purpose (yellow tape)).
scott
IIRC, the purpose of the tape is to force the threads together more tightly.
scott
Scott Lurndal wrote: ...
How would possibly physically do that being so soft as compared to metal?
What it does is simply fill voids as does pipe dope in a more convenient form factor...
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Yes, it works on regular plumbing, it is thicker and takes less.
it acts to reduce friction, thus allowing more torque to be applied to the joint, thus allowing it to be tighter.
it does that too.
I think I've got a tool for that from HF.
That's certainly secondary unless old, rusty threads and still not the actual design purpose...
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That's the primary function and mode of operation...
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Memory confirmed by Wikipedia:
One of the defining characteristics of PTFE is how good it is at defeating friction. The use of PTFE tape in tapered pipe threads performs a lubricating function, which more easily allows the threads to be screwed together, to the point of deformation, which is what creates the majority, if not all, of the seal.
scott
TEFLON TAPE:
When PTFE (Teflon) tape first became available they only made it in the common single density type, which we commonly find in the hardware and home supply stores. Later they began making a double density version, which was twice as thick. Many state and local codes then adopted the double density type as mandatory when making connections for natural gas however since both products were the same color (white) it was difficult for inspectors to be sure which product had been used. PTFE tape is now made in numerous varieties and they have issued a color standard to determine which type should be used.
WHITE-Single density- should only be used on NPT threads up to 3/8 inch. YELLOW- Double Density- yellow double density is often labeled as "Gas type" RED-Triple Density: (Note-the container is red but the tape itself appears as a pale pink color). Presently required on all joints ½" diameter or greater. GREEN- Oil Free PTFE tape- Required for use on all lines conveying oxygen (I.E. medical oxygen or welding oxygen lines). COPPER COLOR- contains granules of copper and is to be used as a thread lubricant but is not approved as a thread sealant. (Generally it is used as a thread lubricant on bolts or pipe threads for mechanical applications where no physical seal is required.)
PTFE tape is only approved as a thread seal when applied correctly. To apply you begin at the end of the pipe and wrap the tape under tension in the direction of the thread turns. Each successive layer should overlap the previous layer by ½ to 2/3 and continue wrapping until the entire threaded portion of the pipe is covered. (Minimum of 3 full turns).
It's called a "male pipe thread".
Actually I have found the White in at least 2 densitys. I have seen some that is so thin that it is difficult to work with, like plastic wrap used for food storage. I now buy Yellow so that I do not have to wonder if I am getting the thicker easier to manage White tape or the very thin stuff. The thin Teflon tape is usually packaged with products like new water faucets.
If you are depending on PTFE to fill voids to prevent leaks you are likely to be dissapointed. PTFE is PRIMARILY a lubricant.
What did you use on the old one?
TFE can become tiny parts. It will clog gas gets and kill those inside.
Thus the hot water heater if gas - use plumbing gunk to lock it up.
Plasma torches and the like have small holes - as do paint guns and the like.
Mart> "Tom Veatch" wrote:
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