Off-road diesel, NPT thread sealant

[BlakeB]

I'm putting a new fuel hose and nozzle on our 500 gallon off-road diesel tank. The hose, nozzle and pump outlet are 3/4 NPT, do I need to apply a sealant of any kind or will the fittings seal fine without it?

 

[KneeGrinder]

Yes, you need a sealant. Yellow teflon tape will be fine. Not white. P.S. "Thats only if its taper threaded" re read, 3/4 npt= use yellow Teflon tape

 

[double vanos]

Rectorseal T+2. I quit using Teflon tape the day I used this. It’s rated for kerosine so I don’t see why diesel would keep it from working. Hasn’t failed me yet.

 

[Linctex]

Originally Posted By: BlakeB

I'm putting a new fuel hose and nozzle on our 500 gallon off-road diesel tank. The hose, nozzle and pump outlet are 3/4 NPT, do I need to apply a sealant of any kind or will the fittings seal fine without it?

Use Rectorseal Tru-Blu if you can find it. or Permatex Teflon thread sealant.

 

[The motor guy]

They always use some kind of liquid sealant on the pumps at the gas station. Looks white or grey looking usually

 

[Rand]

Ok so in true "slick deal" fashion I just ordered the Rectorseal Tru-Blu. This is fine for water use right? for $2.13 (2.60*.82)seems handy for those jobs that teflon tape fails bad on. Could have used this when I replumbed the pipes for my Grandma's well pump and tank replacement and her bathroom pipe stub replacements. Ended up using a combination of tape and pipe dope for the 15-20 fittings .. was time consuming.

 

[jhellwig]

Originally Posted By: KneeGrinder

Yes, you need a sealant. Yellow teflon tape will be fine. Not white. P.S. "Thats only if its taper threaded" re read, 3/4 npt= use yellow Teflon tape

???? color has nothing to do with pipe size.

 

[KneeGrinder]

Originally Posted By: jhellwig

Originally Posted By: KneeGrinder

Yes, you need a sealant. Yellow teflon tape will be fine. Not white. P.S. "Thats only if its taper threaded" re read, 3/4 npt= use yellow Teflon tape

???? color has nothing to do with pipe size.

Nope it sure doesn't. National pipe thread needs a sealant. That was my point. Diesel does require a color for Teflon though. Yellow.

 

[BlakeB]

I actually used white teflon tape last night because I needed to use it and that's all I had. I'll swap it out one day when it warms up. Thanks for the replies.

 

[jhellwig]

Originally Posted By: KneeGrinder

Originally Posted By: jhellwig

Originally Posted By: KneeGrinder

Yes, you need a sealant. Yellow teflon tape will be fine. Not white. P.S. "Thats only if its taper threaded" re read, 3/4 npt= use yellow Teflon tape

???? color has nothing to do with pipe size.

Nope it sure doesn't. National pipe thread needs a sealant. That was my point. Diesel does require a color for Teflon though. Yellow.

Color has nothing to do with what's in the pipe. Use a decent quality tape instead of the cheap junk.

 

[KneeGrinder]

Originally Posted By: jhellwig

Originally Posted By: KneeGrinder

Originally Posted By: jhellwig

Originally Posted By: KneeGrinder

Yes, you need a sealant. Yellow teflon tape will be fine. Not white. P.S. "Thats only if its taper threaded" re read, 3/4 npt= use yellow Teflon tape

???? color has nothing to do with pipe size.

Nope it sure doesn't. National pipe thread needs a sealant. That was my point. Diesel does require a color for Teflon though. Yellow.

Color has nothing to do with what's in the pipe. Use a decent quality tape instead of the cheap junk.

I would beg to differ. Yellow Teflon tape is for diesel, oil, natural, or propane gas. Might have use for other fluids, but white Teflon is not recommended for the fluids I listed.

 

[andy2001]

I Use these 2 products for fuel oil. Should work ok for you Andy https://www.rectorseal.com/rectorseal-no-5/ https://www.supplyhouse.com/Blue-Monster...lUaAkaNEALw_wcB