I admire all of your demonstrations! Thank you. I wish I had learned it when I was young. It must be fun! Thank you.

I like your video because is straight to the point, clear, with no long introductions, Thanks’ a lot

This video rocks. I'm not at all a mechanically inclined guy, but guides like this clear it up even for people with thick heads like me

As noted below, NPT (and pipe in general, as opposed to tubing) is measured by nominal ID rather than OD. As far as 2x4's are concerned, my 100 year old house is built with 2x4 studs that are 2" by 4". The lumber size is the rough cut size, and until the 1940s rough lumber was supplied that way. These days lumber is planed after being rough cut, reducing the finished lumber size by the thickness of two planing cuts.

Excellent, super clear and super informative, learned something today.

I've learnt something today, thanks!

Fantastic video. Thank you.

Exactly what I'm looking for thanks joe

Thank you for the straight talk. You filled in a few blanks for me, like a sealant is absolutely necessary. I struggle with NPT connections because I am never quite sure how tight they need to go. Sometimes they seem very tight and still leak when I used Teflon tape. I guess the tape must have gotten cut as you suggested in the video. I now think I should move to a thread sealer instead. BTW, I can’t imagine why you got 8 thumbs down - thumbs up from me.

Thank you, really helpful

Great video. Thank u for ur time.

Excellent - just what I needed to know. Fuel lines forever leaking on my Willys Jeep!

My brother!! I love this!! THANKYOU! MY PORSCHE 944 THANKS YOU!

.... one of the biggest problems encountered in British Commonwealth countries has been the confusion between "NPT" and the old British standard "BSP" or "BSPP" ... lots of old brass fittings are BSP which use a 55 degree thread form (Vs. the NPT which uses the 60 degree form) the easy way to sort them out is by using a thread gauge to accurately determine the TPI (thread per inch) of the form ... when you get to the 1/2" & 3/4" size they are all the same TPI so be careful there ... have fun !!

Thank you!

Thanks for the education.

Thanks!

GREAT VIDEO! Would love to see another more indepth video on hpa NPT Fittings and to see them be assembled. I Had problems cause i didnt understand NPT and so when trying to assemble my npt fitting for a hpa pcp fill adapter after a turn or 2 by hand they wouldnt go any futher. i thought maybe i had wrong size or bad threads cause i just thought that when the fitting was totally screwes together it would be bottomed out. Well after hours online searching EVERYWHERE I was lucky to find 1 (Yes ONLY 1) Post about my problem only to find out it wasnt a problem :) They are not suppose to bottom out. and after a couple turns by hand they should go no futher and then snug a turn or 2 with wrench and tape or seal is a MUST! Anyway Like i said i had no idea how NPT fittings worked and there is not alot of easy to find stuff online to help ppl in the problem i was having, It would be awesome if youd make a video on it. (TIP:If you dont feel your fittings go in far enough by hand, work with them a while, screwing them in and out by hand over and over til they go in a little by little more til you feel they are together enough by hand "atleast 3 full turns" then clean off any grit and apply tape or paste seal and hand tightn then wrench tight gently 1.5-3 more turns and youll be Good to Go!!! :) ) GOOLUCK ALL! And please try and make us that vid!!!

Thank you

The size refers to the nominal inside diameter of the pipe to be joined.

If i need to Drill and Tap an 1/8 NPT female port, what size hole do i need to drill? will a 5/16" drill bit do?

Useful thnx

A question: If I use an NPT to flared elbow, how do I make sure the elbow points to the direction I want after tightening it up?

thanks sir

It 'd been great if he would have talked about tapping and threads on the NPT

So almost always I hear to use aircraft/military grade hardware and fasteners, normally those are aluminum or stainless steel. The 2 NPT fittings you showed looks like the same brass fittings that I see at the hardware store. Are these different, or are they the same as what I see at HomeDepot and Lowes?

So confusing that the sizes do not match the physical dimennsions, I'd love to know why but...for now could you please clarify which NPT thread would fit snuggly into an apature threaded at M10x1 ???...

NPTF, National Pipe Tapered Fuel, no sealant needed.

Thank you. I just went through this mental abuse with trying to logically measure and compare to no avail. Your 2x4 explanation helped. I am running 3/8 tubing in my fuel system to feed my Lycoming 0320 and trying to keep that size consistent throughout the system has caused a few ordering errors. When I saw a half inch hole in my new fuel tank which they claimed, correctly, that it was3/8 th..........grrrr. I was wrong and they were right. So I order a 3/8 fuel drain to match.......grrrrr thanks for playing. ......seem two worlds collide when the naive and uneducated try to play. Anyway I’m learning. College is cheap compared to the education you receive in real life. Lol adapt adapt adapt.

5:28. Thats what I wanted to know

Brake bleeders should be at the top, where air will accumulate. Unless you plan to ALWAYS pressure bleed (?) your brakes

There are other NPT's used in aviation including NPTF (National Pipe Thread - Fuel) and NPTA (National Pipe Thread Aerospace). Neither of these use any kind of sealant and they are mechanically sealed at the threads. I've never used thread sealant on any certificated airplane, why would I want to use it on my home-built?

Thank you very interesting I can work with brass fittings but this light allow I to soft and brakes to easy or splits and should not be allowed to be used on compressors China and Germany are using a lot of these why is it allowed

If it is a fuel filter then why does it have wires coming out of it like an in-line fuel pump

i ended up here because i ordered a 1/4" gauge and it was too large to fit in a 3/8" hole.