Good point. There have been any number of times I've had to removed a taped
joint. I bought a PTZ dome camera from China and they sent along the
biggest roll of teflon tape I've ever seen. When I ordered a second one, it
came with an O ring to provide the same waterproofing. I spent quite some
time (as Tony warned I might) trying to find out more from the Chinese
vendors to no avail. Oh well, the camera was 1/4 what US vendors wanted for
the same thing that probably came with the same obtuse directions.
Going to deploy one this weekend - not sure I should water test it with the
garden hose before bothering to climb the ladder. Apparently water can get
in through the wire entrance to the threaded dome cap. But I'd rather do it
with tape because it might have to be taken down to dry out if the
tape/gasketing doesn't work.
I bought some (wildly overpriced) stuff called Sugru that is a hardening
putty that I might use to seal the wire entry because it's fairly easy to
(No affiliation and we'll find out tomorrow if it does what it says.)
On Friday, July 24, 2015 at 9:42:33 PM UTC-4, Robert Green wrote:
Removing a taped joint is the same as removing a dope joint,
you just unscrew it. It doesn't require removing pipe dope.
And if you're putting it back together and want to clean it up,
either a rag or a wire brush works for me. Funny, if pipe dope
is so hard to use, why do so many pros still use it?
Interesting enough today the wife and I went shopping the local home
improvement chain stores [northwest Chicago] for light fixtures and I took a
look at their flexible gas connection kits out of curiosity. Both chain
stores included skinny WHITE Teflon tape spool with their kits for use with
the gas connections. Apparently a LOT of water heaters are being installed
with the white Teflon tape. --- Steve
Trouble is, the people who are coming in there aren't any smarter than the
people who work there. There is a gas tape. Anyone who doesn't know the
difference shouldn't be working on gas lines.
The only difference between "gas" tape and good old white Teflon in the
thickness, and color. Other than that, they are the same. The ONLY problem
using Teflon tape for gas lines is the concern of getting tape fragments
into gas valves and other controls. Anyone with a tiny bit of knowledge
knows how to avoid that problem, using tape or not. Used properly white
Teflon tape poses no problem.
As someone else mentioned, you shouldn't be using any type of thread
sealer on gas flex pipe. Those are flare connections and no gas should
even be exposed to the threads. In fact, putting anything on the
threads may make it harder to get the flare connection tight enough.
You only seal rigid pipe-to-fitting connections.
replying to Steven L Umbach, Virgil wrote:
I use white for water and Yellow for Gas in some places this is code you have
to check your local Inspectors the yellow is thicker with a higher density
working with Gas I just feel better leaving a job knowing I did all I could to
prevent any leaks from popping up down the road
It is just dumb to put both on a pipe. Use one or the other. I saw a
Youtube of putting pipe dope on a flaired fitting threads. Another dumb
move as there should be nothing to leak at the threaded part.
If it does leak, something was not done correctly.
Teflon tape is not supposed to be used on natural gas lines. Something
about the gas dissolving the tape. It's ok on propane though. There is a
special tape made for nat. gas, but I have never used it. so I dont know
the name of it, or if it's readily available. Years ago, I did some work
on nat. gas pipes, for my parents. I just used pipe dope. Where I live
now, I only have propane, but I still use pipe dope. Normally people use
copper tubing for propane, so no sealer is needed since the fittings are
flared copper or compression rings. But my house had black iron pipe for
the furnace. When I ran a line to the kitchen for a stove, I decided it
was best to keep the same pipe to prevent dialectric corrosion, so I
used black iron pipe with dope in the fittings.
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