Best way to seal gas line threads, Pipe dope, teflon tape, or both?
Mikepier
pipe threads in my gas line. Actually I suspected for some time there
was a leak in this particular spot, but could never pinpoint it
because of the closed ceiling. Now that the ceiling is gone, I have
found the problem.
So rather than try to take the cheap way out and try to seal it from
the outside with epoxy, I am going to take everything apart, reseal
it, then put it back. Its 3/4 black pipe.I want to do this once and do
it right. What is the best way to seal the threads? I have both pipe
dope, and yellow teflon tape for gas.
Smitty Two
<8f91f197-16f2-4e43...@u3g2000vbj.googlegroups.com>,
Mikepier <mike...@optonline.net> wrote:
My vote goes with the dope, but either will work. I use tape on machined
fittings, but dope on pipes. Now a bunch of people here will say to use
both, but personally I think that's counterproductive, as each
interferes with the efficacy of the other. IMO, of course. This issue
raises as many hackles as WD-40 around here.
Ken
I believe there are two different types of Teflon tape. One is
approved for gas and the other is not. Read the instructions if using
Teflon tape.
Stormin Mormon
Rectorseal #5 alone, for gas. Clean the threads with a wire
brush, if it's old pipe. Paint the rectorseal on the
external threads, only.
For galvanized with water pressure, we used white teflon
plus Rectorseal #5 non hardening.
I don't see any problem with yellow teflon tape plus
Rectorseal. Wrap the external threads, pull the yellow tape
to break it, and then a dab of Rectorseal on top of the
teflon. Teflon tape makes the threads slipper so they can
seat better. Rectorseal fills in the gaps.
--
Christopher A. Young
Learn more about Jesus
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"Mikepier" <mike...@optonline.net> wrote in message
news:8f91f197-16f2-4e43...@u3g2000vbj.googlegroups.com...
Stormin Mormon
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"Smitty Two" <prest...@earthlink.net> wrote in message
news:prestwhich-C473C...@mx02.eternal-september.org...
Smitty Two
"Stormin Mormon" <cayoung61**spamblock##@hotmail.com> wrote:
> And, how would they interfere with each other?
The same way top-posting interferes with continuity on a usenet thread.
Is logic forbidden in the Mormon Church?
Seriously, this is so obvious to me that I have trouble understanding
why anyone would think that they wouldn't interfere with each other.
Like saran wrap and glue.
HeyBub
It's my understanding that the Teflon tape is not meant to be a sealant.
It's purpose is to reduce the friction in joining threaded pipes so that
they screw together more completely. The depth of the pipe in the fitting
determines the seal, not the tape.
This notion seems semi-confirmed when you take apart a pipe and a fitting
that's had Teflon tape used on the previous joint. The tape is usually
shredded.
tra...@optonline.net
> During my basement reno, I discovered a small gas leak at one of the
> pipe threads in my gas line. Actually I suspected for some time there
> was a leak in this particular spot, but could never pinpoint it
> because of the closed ceiling. Now that the ceiling is gone, I have
> found the problem.
OMG! Let me get this right. You smelled a gas leak, but because
a finished basement ceiling was involved, you just waited until you
finally renovated the basement?
Suppose it involved the kitchen ceiling, would you have waited 15
years
until you renovated the kitchen?
Jon Danniken
> I believe there are two different types of Teflon tape. One is
> approved for gas and the other is not. Read the instructions if using
> Teflon tape.
This is the correct answer. Use gas-rated teflon tape (yellow up to 1/2",
red for 1/2" and up), which is thicker than water-duty (white) teflon tape
(color refers to the spool, not the tape itself).
Jon
Tony Miklos
I've been avoiding these... uh... thread threads. Is anyone still
arguing that the pipe dope is just a lubricant? ;-)
Red Green
september.org:
Did you learn that from the OP's last line?
Ken
No, I guess I missed his last line.
Stormin Mormon
use WD-40 properly, you Nazi!!!!! (Needs at least
four exclaimation points. Shift lock caps optional.)
--
Christopher A. Young
Learn more about Jesus
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.
"Tony Miklos" <Tony....@gmail.com> wrote in message
news:8p3ch2...@mid.individual.net...
Mikepier
> a finished basement ceiling was involved, you just waited until you
> finally renovated the basement?
>
> Suppose it involved the kitchen ceiling, would you have waited 15
> years
> until you renovated the kitchen?
Well it was more like a couple of days, but I see your point.
Having said that, while I am disassembling everything, is there any
harm installing another shut-off valve? This way in the future if I
have to do any work, I do not have to go to my gas main and shut down
the whole house. With this new valve, I can still keep the furnace
and hW heater going. Downstream of this new valve would be my stove
and dryer.
Red Green
news:igi3on$tpf$1...@news.eternal-september.org:
Been there. Just my turn to be the dealer :-)
Smitty Two
Tony Miklos <Tony....@gmail.com> wrote:
>
> I've been avoiding these... uh... thread threads. Is anyone still
> arguing that the pipe dope is just a lubricant? ;-)
I use it on my bicycle chain, and to free sticky lock mechanisms.
Red Green
31589A.103...@news.eternal-september.org:
Have you heard about WD-40 for that?
Just wondering....
cl...@snyder.on.ca
Don't know about where you are, but around here the rule is still
pipe dope only for iron gas pipe.
The Daring Dufas
Alabama gas techs use a Teflon containing pipe dope made by Oatey.
http://preview.tinyurl.com/6b7qqrp
TDD
Stormin Mormon
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"Mikepier" <mike...@optonline.net> wrote in message
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Stormin Mormon
;)
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Christopher A. Young
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"Red Green" <postm...@127.0.0.1> wrote in message
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Red Green
$clk$2...@news.eternal-september.org:
> Only frieking Nazis use WD as a bike chain treatment!!!!!!
> ;)
>
Ja vohl, Herr Kommandant!
notbob
> Alabama gas techs use a Teflon containing pipe dope made by Oatey.
PST.... Loctite 567. When only the best will do.
nb
FatterDumber& Happier Moe
> When I was working for someone else, doing HVAC. We used
> Rectorseal #5 alone, for gas. Clean the threads with a wire
> brush, if it's old pipe. Paint the rectorseal on the
> external threads, only.
>
> For galvanized with water pressure, we used white teflon
> plus Rectorseal #5 non hardening.
>
> I don't see any problem with yellow teflon tape plus
> Rectorseal. Wrap the external threads, pull the yellow tape
> to break it, and then a dab of Rectorseal on top of the
> teflon. Teflon tape makes the threads slipper so they can
> seat better. Rectorseal fills in the gaps.
>
Yep, good clean threads, this stuff, properly tightened and you won't
have a leak.
http://www.rectorseal.com/index.php?site_id=1&product_id=212
Larry W
Mikepier <mike...@optonline.net> wrote:
Either one, if used in accordance with the manufacturer's instructions for
an approved purpose, is equally effective.
--
There is always an easy solution to every human problem -- neat,
plausible, and wrong." (H L Mencken)
Larry Wasserman - Baltimore Maryland - lwasserm(a)sdf. lonestar. org
Stormin Mormon
I've heard.
--
Christopher A. Young
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"The Daring Dufas" <the-dari...@stinky.net> wrote in
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Stormin Mormon
used to make!
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"FatterDumber& Happier Moe"
<"WheresMyCheck"@UncleSamLoves.Mee> wrote in message
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Stormin Mormon
Reddengreenenheimer!
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"Red Green" <postm...@127.0.0.1> wrote in message
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Ed Pawlowski
"Smitty Two" <prest...@earthlink.net> wrote in message
news:prestwhich-31589...@news.eternal-september.org...
I use yellow teflon tape for that, but it takes a long time to wrap around
each link.
The Daring Dufas
> Doesn't the white teflon stuff get dry and crumbly? Or, so
> I've heard.
>
Nope, it doesn't dry out.
TDD
Stormin Mormon
de France.
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"Ed Pawlowski" <e...@snetnospam.net> wrote in message
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Stormin Mormon
in the winter. I sense that some of the dry buildings here
could dessicate desert rocks.
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"The Daring Dufas" <the-dari...@stinky.net> wrote in
message news:igjg7v$otk$2...@news.eternal-september.org...
booboo
> Loctite 567
Either one. Yellow teflon for gas or dope, theyre both a standard for sealing
gas pipe. That goes for unions too. Just make sure you crank down hard on on
your connection either way you go, black pipe can take it.
--
for full context, visit https://www.homeownershub.com/maintenance/best-way-to-seal-gas-line-threads-pipe-dope-teflon-tape-o-614113-.htm
trader_4
> replying to Mikepier, booboo wrote:
> > Loctite 567
> Either one. Yellow teflon for gas or dope, theyre both a standard for sealing
> gas pipe. That goes for unions too.
for the threads that connect to the pipe, but it does no good on the
threads that close the union, at least as far as preventing leaks.
Those threads are not involved in sealing. It might help in making
them easier to take apart someday, but I've never bothered.
dpb
> replying to Mikepier, booboo wrote:
>> Loctite 567
> Either one. Yellow teflon for gas or dope, theyre both a standard for
The only difference in yellow teflon and white is the thickness (and the
color, doh! :) ). It just takes more wraps with white to get the same
amount is all...there isn't anything about the tape itself that is any
different for gas specifically.
--
Ralph Mowery
tra...@optonline.net says...
> On Friday, June 15, 2018 at 12:44:06 PM UTC-4, booboo wrote:
> > replying to Mikepier, booboo wrote:
> > > Loctite 567
> > Either one. Yellow teflon for gas or dope, theyre both a standard for sealing
> > gas pipe. That goes for unions too.
>
> Depends on what you mean by union. I agree dope or tape is appropriate
> for the threads that connect to the pipe, but it does no good on the
> threads that close the union, at least as far as preventing leaks.
> Those threads are not involved in sealing. It might help in making
> them easier to take apart someday, but I've never bothered.
>
>
>
>
them, maybe oil to lubercate. As they do not seal anything , they just
need to pull the two pieces of the union together.
I do like the dope over the tape if the joint is not likely to be taken
apart.
jdjo...@gmail.com
jdjo...@gmail.com
Clare Snyder
>This is the first time I have replied to a blog or post regarding the repair of a gas line. You can use pipe dope, teflon tape or both. My suggestion is to use both as a guarantee. If you are a home owner and doing the repairs yourself, you should know that both are designed to adjoin and seal any gas leak if gas lines are tightened properly. Yellow tape, designed for gas pipes has a higher density than the white tape used for water. That is the only difference, but since most respectable contractors use yellow tape for gas, I would suggest you do the same and follow it up with some pipe dope, also made of teflon to ensure you have a nice seal. After that, check if there is a leak by spraying soap and water onto your newly installed joints. If there is a leak, you will see bubbles. Hope I helped.
The thicker (generally pink) tape is made for gas fittings. Teflon
paste also works well. The "stick" or "crayon" type pipe dope is a lot
less effective and "I" won't use it again.
Clare Snyder
fresh and well mixed.
dpb
...
> Use the tape - alone. Or use the dope - alone - IF the dope is still
> fresh and well mixed.
--
Bod
--
Bod
trader_4
I use dope, usually. Faster. Any inspector that sees both is going to know that it was an amateur job. Some people think that more is always better, even though many times it's not.
Scott Lurndal
joint, but rather to force matching tapered threads into each other to create
a gas-tight seal.
Tape will not seal parallel threads.
Yellow is the standard tape color for use in natural gas piping systems.
Clare Snyder
TEFLON
Clare Snyder
wrote:
A tapered pipe thread is by definition a "dry seal" joint - but in
practice it is imperfect. The tape "flows" to fill imperfections in
the joint as well as functioning as a low-friction "lubricant" to
allow the two parts of the joint to turn together without galling. If
ALL it did was provide the low friction, common EP Grease would do the
job - and it does NOT.
trader_4
Scott Lurndal
to seal. Grease would simply flow out of the joint.
trader_4
Clare Snyder
SEALANT.
Bod
--
Bod
Colonel Edmund J. Burke
> This is the first time I have replied to a blog or post regarding the repair of a gas line. You can use pipe dope, teflon tape or both. My suggestion is to use both as a guarantee. If you are a home owner and doing the repairs yourself, you should know that both are designed to adjoin and seal any gas leak if gas lines are tightened properly. Yellow tape, designed for gas pipes has a higher density than the white tape used for water. That is the only difference, but since most respectable contractors use yellow tape for gas, I would suggest you do the same and follow it up with some pipe dope, also made of teflon to ensure you have a nice seal. After that, check if there is a leak by spraying soap and water onto your newly installed joints. If there is a leak, you will see bubbles. Hope I helped.
>
neopla...@gmail.com
> During my basement reno, I discovered a small gas leak at one of the
> pipe threads in my gas line. Actually I suspected for some time there
> was a leak in this particular spot, but could never pinpoint it
> because of the closed ceiling. Now that the ceiling is gone, I have
> found the problem.
> So rather than try to take the cheap way out and try to seal it from
> the outside with epoxy, I am going to take everything apart, reseal
> it, then put it back. Its 3/4 black pipe.I want to do this once and do
> it right. What is the best way to seal the threads? I have both pipe
> dope, and yellow teflon tape for gas.
PJBeee
Recently discovered a tiny leak in the threads on a utility side gas supply pipe fitting that even the gas company didn't detect. It generated a small "bag" of tiny bubbles after a soapy-water spray. Took a couple of DAYS to notice it - could not even smell gas, the leak was so small, but the utility did of course fix it. I am not sure what sealant was used on it - the fitting hadn't been touched for over 10 years, and might have been leaking for that long - but it was not Pro-dope, and it was certainly not teflon; that I could tell.
PJBeee
Ed Pawlowski
> I only do this for myself at home, but for gas pipe tapered threads, I have used only Pro-dope for years and years, with no evidence of any leaking. Used it on 1/2", 3/4" and 1" pipe. Applied to male threads only, per code. And made connections as tight as I could. And believe me, I take the dangers of natural gas very seriously, so I've checked and re-checked for leaks for weeks after installation.
>
>
There is a tape made for gas lines. It is yellow in color. I've used
it at home and we've used it at work for some 4" gas lines with higher
pressure and never had a problem.
We also used Pro Dope in another section. That worked also.
Either one done right works. No short cuts and you will be good.
Bob F
PJBeee
Clare Snyder
wrote:
>FYI this is a bit ott-topic, but for water pipe tapered threads, I have also typically used only Pro-dope,. But recently I had a PVC water pipe tapered fitting not stop leaking until I used a combination of teflon tape and Pro-dope. Go figure.
Chinese PVC. Maybe you shoulf have just used PVC cement - - -
gfre...@aol.com
wrote:
Bob F
100% agreement.