Fuel tank outlet thread sealant

OregonAaron · Dec 11, 2021

So, on a fuel tank (diesel) the outlet threads that the tank shut off valve threads into what do y'all use to seal the threads? Regular teflon thread tape? Some sort of liquid sealer?

old · Dec 11, 2021

I have never used any thing. That fitting should be pipe tread so you tighten it up to the point there is no leaks. If it leaks then you have a tread problem

SVcummins · Dec 11, 2021

I use hi tack or aviation Sealant permatex

DeltaRed · Dec 11, 2021

I use teflon tape.I'm very careful to
keep it at least one thread from the
end.

rustred · Dec 12, 2021

Well maybe u dont, but it is standard practice on pipe threads to seal them. They always weep with dry threads. Even natural gas line threads are sealed outside of homes.

plowhand · Dec 12, 2021

Teflon tape made for
chemicals-diesel-gasoline
its yellow can buy it at
Home Depot..good luck.

gene bender · Dec 12, 2021

i LIKE THE TEFLON PASTE

caterpillar guy · Dec 12, 2021

I have done it both ways. Back when you could get good parts and pipe fittings with accurate threads you didn't really need anything. Now with poor product and poor quality threads you probably will need something. Tape goop or what ever you choose. Fuel tanks are not some scientific thing to seal fittings on. Pretty much anything that you would use on an engine gasket will seal the threads. I have used several things tape,permatex,liquid teflon,rector seal, you choose.

Davidj · Dec 12, 2021

What I use..... Standard practice in the heating trade around here.

Tim in New York · Dec 12, 2021

Somewhere, probably this site, I saw about Gasoila. Supposed to be resistant to fuel. I tried it on my IH gas tank fittings and it seemed to clear up what had been a constant leak problem. Teflon would work for a while, but not very long. Its been at least a year and so far no leaks.

https://fedpro.com/products/gasoila%C2%AE-soft-set-thread-sealant-with-ptfe

Tim

grandpa Love · Dec 12, 2021

Tube of yellow pipe dope from home
Depot. Says it's for gas, works great!

Steve@Advance · Dec 12, 2021

Several products have been listed, all will work.

But the most important thing to check in this global trade world, is to KNOW what thread it is!

Easy to assume it's NPT when it can easily be BPT! They will usually screw together, but will leak, and once tightened, the threads of both pieces are forever damaged!

OregonAaron · Dec 12, 2021

Well, I have several of these products here at the house. My fuel outlet has been weeping for awhile and while I know how to seal threads, seems that alot of products don't work as well with chemicals like gas or diesel. Thanks for the responses

DoubleO7 · Dec 12, 2021

Permatex form-a-gasket number 3

But be careful not to tighten too much.

Typically, many fuel tank npt outlets are merely an area of metal a little thicker than the tank.
Over torquing can split the female port, then your screwed.

504 · Dec 12, 2021

Gasoila,sealing fuel threads is what it is made for.

fixerupper · Dec 12, 2021

Many times when I screw the sediment bowl or shutoff valve back into the tank the fitting does not get tight enough to dry seal when I reach that spot where the fuel line lines up perfect. One more turn will twist the fitting off. This is where thread tape and thread dope come into play.

hd6gtom · Dec 12, 2021

Fuel business use Rector Seal #5. Approved for gas, diesel, and
LP Gas.

Fuel tank outlet thread sealant

OregonAaron

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old

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SVcummins

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DeltaRed

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rustred

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plowhand

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gene bender

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caterpillar guy

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Davidj

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Tim in New York

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grandpa Love

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Steve@Advance

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OregonAaron

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DoubleO7

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504

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fixerupper

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hd6gtom

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