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+-- Thread: When Is 1/4" Not 1/4"? (/showthread.php?tid=7162329)
When Is 1/4" Not 1/4"? - crokett™ - 12-07-2015
when its plumbing. At the BORG was holding a water line that has 1/4" fittings for the fridge. Yet it doesn't fit any of the 1/4" fittings in the plumbing department. The fitting broke on the line attached to the fridge, I was trying to replace it. I hate plumbing. 1/4" NPT is not the same as the 1/4" fittings on a refrigerator.
Re: When Is 1/4" Not 1/4"? - Mr_Mike - 12-07-2015
Shouldn't that be 1/4 " compression, not NPT?
Re: When Is 1/4" Not 1/4"? - who - 12-08-2015
yep, compression on the fridge....
Re: When Is 1/4" Not 1/4"? - crokett™ - 12-08-2015
Mr_Mike said:
Shouldn't that be 1/4 " compression, not NPT?
Why is there a difference? Why can't 1/4" just be 1/4"? Either a) make all plumbing fixtures use the same fittings, or b) standardize on them so that 1/4" is universal.
Re: When Is 1/4" Not 1/4"? - theeviltwinn - 12-08-2015
Different fittings for different applications.
Twinn
Re: When Is 1/4" Not 1/4"? - Robert Adams - 12-08-2015
Different material. Npt is pipe thread heavy steel pipe. The fridge uses copper or plastic. The standard is the interior pipe diameter not the construction of the pipe.
Re: When Is 1/4" Not 1/4"? - JGrout - 12-08-2015
crokett™ said:
[blockquote]Mr_Mike said:
Shouldn't that be 1/4 " compression, not NPT?
Why is there a difference? Why can't 1/4" just be 1/4"? Either a) make all plumbing fixtures use the same fittings, or b) standardize on them so that 1/4" is universal.
[/blockquote]
Pipe threads are tapered
compression threads are not tapered and much finer.
Accuracy has a place....
Re: When Is 1/4" Not 1/4"? - crokett™ - 12-08-2015
It doesn't make it any less annoying. the other complication was the line on the fridge is 5/16" OD. No one has 5/16" fittings locally not even the pro shops. I ended up with a 5/16" to 1/4" reducing coupling and a universal plastic line that has a 1/4" compression fitting on it. It's not pretty but it doesn't leak.
Re: When Is 1/4" Not 1/4"? - A Squared - 12-08-2015
crokett™ said:
[blockquote]Mr_Mike said:
Shouldn't that be 1/4 " compression, not NPT?
Why is there a difference? Why can't 1/4" just be 1/4"? Either a) make all plumbing fixtures use the same fittings, or b) standardize on them so that 1/4" is universal.
[/blockquote]
It may be a pipe/tubing thing. "pipe" diameters are nominally inside diameter (very nominally sometimes) while "tubing" diameters are based on outside diameter.
Re: When Is 1/4" Not 1/4"? - A Squared - 12-08-2015
JGrout said:
Pipe threads are tapered
Not all pipe threads are tapered. There's also NPS threads which are straight. They're used on conduit