I replaced my water heater yesterday and used a flexible gas pipe to
reconnect natural gas to it. I used my white Teflon tape on the fittings for
a seal and all appears well. Then I noticed some info on the internet that
you should not use white Teflon tape on gas fittings - only yellow.
Apparently there is a risk [don't know how great] that the white tape can
damage the gas regulator or such due to bits of it shredding off. Now I am
wondering if I should change it or just leave it. My thinking is that
removing/reinstalling the fittings may introduce more risk that just leaving
well enough alone? The gas heater is installed in the basement next to the
furnace right next to a floor drain. Any advice appreciated. --- Steve
Teflon is Teflon. Apparently some manufacturers offer a heavier
tape. It may or may not be less subject to shredding. It has
always been important to keep the tape back off the lead threads.
I know a few plumbers that do both Teflon (white, by the way) and
pipe dope on the larger size pipe - 1 1/2" and up. When I asked
why I got the belt and suspenders type answer.
Do not take something apart that is functioning.
(top posted for your convenience)
Keep the whole world singing . . . .
DanG (remove the sevens)
I would replace it with either the gas-rated tape, or the old-fashoined
gooey pipe sealer. The typical white teflon tape is not to code, or so
I have been told by a plumber I happened to ask at the hardware store,
who was most emphatic.
If the flex pipe has a flared fitting on both ends (and it
should if it is for gas), then there is no need to use
anything on the threads. The actual seal is between the flare
and the bell end of the fitting.
Thanks for all the replies. All continues to work well and I verified that
the gas connections are leak free. I did some searching on the internet and
could not find any evidence of more than usual premature failures of gas
water heaters [gas delivery related] because of using white Teflon tape on
the gas pipe connection. My guess is that there probably is some sort of
inlet screen on the thermostat to stop large particles from getting into it.
Also I feel that disassembling it at this point could do more harm than good
due to all the Teflon tape that would come loose in the threads during the
removal process. Thanks again and next time for sure I will use the yellow
stuff. --- Steve
I used the gooey stuff on mine. Each of my downward pipes that is going
into the heater or furnace as a T at the bottom with dead end let with a
cap on it. I guess any thing that goes down that pipe ends up in this
small dead in drop area. There are several of these.
Is there any specific amouont of torque that should be on a gas pipe?
Piece of cake.
IF the gas valve fails to close one day (and it's under warranty), you'll
gripe and moan about inferior products and replace the gas valve. When the
manufacturer of the GV takes it apart and finds bits of Teflon tape in the
valve, he'll deny the claim.
After the warranty period? The burner may never shut off OR the gas may
sputter and not get lit by the pilot until one day... BOOM.
Most directions say not to use Teflon tape. Who needs directions anyway?
Omfg where do people come up with this stuff?
Really God help anyone you do work for.. they will believe the sky is falling
and they need to replace their muffler bearings or their car will stop
working....in the middle of the freeway during rush hour.
On Thu, 23 Jul 2015 17:25:43 -0400, email@example.com wrote:
Nothing is easier than wrapping pipe threads with teflon tape, and if
gas, starting the tape on the second or third thread.
Besides, they make yellow tape for gas applications. I've only used
pipe dope a couple times in the last 40 years. It's easier/cleaner to
use tape and tape provides a better seal.
BTW, were you "making" a joke there?
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