New diesel fuel tank threaded connections

[The Brockerts]

New diesel fuel tank threaded connections
I’ve just installed some new diesel fuel tanks.I’ve had a several new hoses made for the connections that have threaded ends. From what I find Teflon tape could be used for the threaded fittings to the tank. Would anyone recommend something else instead of Teflon tape?

The Brockert’s

 

[motion30]

Definitely not Teflon never good for fuel system. Do little research to see what pipe though is compatible with diesel fuel

 

[HopCar]

My favorite pipe sealant is called Leak Lock. You can use it to seal just about everything on a boat, diesel, gasoline, lpg, hydraulic fluid, salt water, potable water and much more.
https://highsidechem.com/leaklock/

 

[Comodave]

No teflon tape, it can get into the injection pump and injectors. Leak lock is good.

 

[tiltrider1]

This thread tape is much thicker than the white tape. It’s industrial grade and is diesel safe.

 

[KnotYet]

No teflon tape, it can get into the injection pump and injectors. Leak lock is good.

One would hope and expect that there would be a filter or filters before the pump.

Most people are unfamiliar with the proper technique for using teflon tape, though.

 

[Comodave]

Ask Steve D about it. I will take his opinion any day.

 

[sean9c]

Rectorseal 5. The best part is that you can get it at Home Depot

 

[Nick F]

I also prefer teflon tape for locations which are upstream of the filters.

A variant of teflon tape called Petro Tape is much heavier and I have found it very good for fuel connections.

https://cf-t.com/jet-lube-30793-pet...nyTiPb7gCW1-DnQjUQS9bMs56TJUpOBBoCQP4QAvD_BwE

 

[mvweebles]

My favorite pipe sealant is called Leak Lock. You can use it to seal just about everything on a boat, diesel, gasoline, lpg, hydraulic fluid, salt water, potable water and much more.

https://highsidechem.com/leaklock/

+1 on Leak Lock.

I replaced my two steel diesel saddle tanks (225g each) with four fiberglass tanks (110g each). I was obviously concerned about sealant for the threaded crossover connections. I reached out to Steve D'Antonio who also recommended Leak Lock.

Peter

 

[Bmarler]

I like a combination approach. I’ll use a wrap of good quality tape, being careful to leave the first thread bare. Then use a sealant like loctite 545 or 569 depending on what I’m working on.
I find the single wrap of tape eases removal down the road while the sealant improves initial and long term sealing.

 

[twistedtree]

It's indirectly related, but that is the tank material, and what are the fitting materials? It's just as important that they be compatible materials as the sealant used.

 

[Larry M]

Rectorseal 5. The best part is that you can get it at Home Depot

It doesn't harden and is easy to use. When we replaced our fuel tanks, I used it on maybe 20 fittings and never had a leak.

https://rectorseal.com/rectorseal-no-5-special-group/

 

[sean9c]

and is the choice of Tony Athens at Seaboard Marine

It doesn't harden and is easy to use. When we replaced our fuel tanks, I used it on maybe 20 fittings and never had a leak.

https://rectorseal.com/rectorseal-no-5-special-group/

 

[C lectric]

I use Rectorseal #5.
I have also used Permatex Aviation Form a Gasket . Neither has leaked where I have used them. My favorite these days is the Rectorseal or similar..

I will NOT use any of the TFE tapes. I do my own work on my boat, mostly, and also did a fair bit of Hydraulic repairs at work and WE NEVER USED TFE TAPE.
The cost of chasing down a wee piece of tape that decided to do some thing else was not worth it , not even close.

THe tape is good in other applications as long as you use it properly as BMarler describes. Leave the first pipe thread alone , no tape, and go from there.

I still don't like it since if ever you have to dismantle those fittings then you must be carefull to get all the wee TFE bit out or the threads.

JMO