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Greenfrog Long Time User
Joined: 12 Jan 2008 Posts: 624
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Posted: Wed Dec 20, 2017 4:49 pm Post subject: Pipe dope for brass gas line connections? |
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What kind of thread sealer do I use for brass threads where it is exposed to gasoline?? For example, where sediment bulb /shut off connects below tank and on the brass barbs on an in-line shut-off. Teflon? Probably not for gasoline. Or maybe use none.....
Advise please. Thx in advance. |
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Steve@Advance Tractor Guru
Joined: 12 Nov 2013 Posts: 12441
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Posted: Wed Dec 20, 2017 5:55 pm Post subject: Re: Pipe dope for brass gas line connections? |
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Teflon tape will work, but you have to be very careful not to get any beyond the end of the fitting as it can clog fuel system components.
I like "Permatex Form a Gasket #3". It is gas resistant, and not supposed to clog if it gets in the line, but still, be stingy with it. |
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guido Tractor Guru
Joined: 09 Aug 2007 Posts: 7694
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Posted: Wed Dec 20, 2017 6:01 pm Post subject: Re: Pipe dope for brass gas line connections? |
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Hello greenfrog,
Yep! Teflon tape it is yellow for gas piping threads,
Guido. |
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D beatty Tractor Guru
Joined: 23 Jan 2013 Posts: 8137
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Posted: Wed Dec 20, 2017 6:24 pm Post subject: Re: Pipe dope for brass gas line connections? |
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I also use the Permatex Foam a Gasket that's good for gasoline and doesn't set real hard. If the threads are good on fitting I some times use nothing. |
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504 Tractor Guru
Joined: 14 Jun 2005 Posts: 5379
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Posted: Wed Dec 20, 2017 6:44 pm Post subject: Re: Pipe dope for brass gas line connections? |
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Gasoil |
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WGM Tractor Expert
Joined: 11 Sep 2004 Posts: 2632
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Posted: Wed Dec 20, 2017 7:17 pm Post subject: Re: Pipe dope for brass gas line connections? |
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Teflon tape should not be used in any pipe installation. |
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jsborn Regular
Joined: 09 Oct 2012 Posts: 288 Location: South Georgia
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Posted: Thu Dec 21, 2017 6:19 am Post subject: Re: Pipe dope for brass gas line connections? |
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CVPost-wgm wrote: | (quoted from post at 23:17:41 12/20/17) Teflon tape should not be used in any pipe installation. |
Please give us more details as to why Teflon tape should not be used in any pipe installation. I am sure the millions of other users of Teflon tape would like to know more. |
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old Tractor Guru
Joined: 12 Mar 2000 Posts: 79042 Location: Lake of the Ozarks area of MO
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Posted: Thu Dec 21, 2017 8:01 am Post subject: Re: Pipe dope for brass gas line connections? |
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Teflon tape melts in gas so then it can get into the carb and clog things up big time and can then go back to a solid which can make cleaning it out almost impossible |
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old Tractor Guru
Joined: 12 Mar 2000 Posts: 79042 Location: Lake of the Ozarks area of MO
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Posted: Thu Dec 21, 2017 8:03 am Post subject: Re: Pipe dope for brass gas line connections? |
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NOTHING. Many things if you try to use them gas sort of eats or melts and then it can end up in the carb and cause major head aches and even cause a carb to need to be replaced |
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Moonlite37 Long Time User
Joined: 04 Jul 2009 Posts: 1240
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Posted: Thu Dec 21, 2017 3:10 pm Post subject: Re: Pipe dope for brass gas line connections? |
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Just not needed. Brass threads are very smooth and seal well |
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Greenfrog Long Time User
Joined: 12 Jan 2008 Posts: 624
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Posted: Thu Dec 21, 2017 3:37 pm Post subject: Re: Pipe dope for brass gas line connections? |
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Yes, just learned that at local ACE hardware store. However we concluded that that kind was for natural gas or LP and not for gasoline and decided not to use it. I think I will use nothing, brass fits good together.
However, all of you who replied here brings up something, in fact might have solved a mystery: last summer I had the 1942 CASE SC into a local implement dealer shop to get carb cleaned and rebuilt. After that, It actually began to run badly and became harder to start. I seeked a second evaluation from another mechanic. he took carb apart and found a gob of something in the intake jet. Wonder if this was Teflon tape?....as they put an inline filter and a brass shut-off inline in the gas line and used Teflon tape. .????🤔🤔🤔 |
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showcrop Tractor Guru
Joined: 13 Dec 2000 Posts: 22242 Location: Chester NH
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Posted: Thu Dec 21, 2017 4:21 pm Post subject: Re: Pipe dope for brass gas line connections? |
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CVPost-wgm wrote: | (quoted from post at 20:17:41 12/20/17) Teflon tape should not be used in any pipe installation. |
Wow! it looks like WGM is recommending that all teflon tape be dumped and the manufactures close their doors. |
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Mike(NEOhio) Tractor Guru
Joined: 12 May 2013 Posts: 4068 Location: Geauga County, Ohio
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Posted: Fri Dec 22, 2017 10:28 am Post subject: Re: Pipe dope for brass gas line connections? |
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I needed some sealer for an LP line and got Blue Monster from a plumbing supply. Good for just about anything but Oxygen. Even sealed a bead on a small snow blower tire. |
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hd6gtom Tractor Guru
Joined: 20 Jan 2011 Posts: 4538
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Posted: Sat Dec 23, 2017 2:15 pm Post subject: Re: Pipe dope for brass gas line connections? |
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Rector Seal-- professional product made for gas, diesel, lp gas, nat gas. |
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Richard G. Tractor Guru
Joined: 08 Oct 2000 Posts: 9579 Location: Oakway, SC
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Posted: Sun Dec 24, 2017 6:05 am Post subject: Re: Pipe dope for brass gas line connections? |
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I use Blue Monster for fuel and water lines. I just keep the stuff from near the end of the male part so it does not get into the line.
Richard in NW SC |
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