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Coupler for 1/2" copper pipe to 1/4" NPT?

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Forum topic by Keith Kelly posted 01-20-2017 11:06 PM 1133 views 0 times favorited 10 replies Add to Favorites Watch
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Keith Kelly

257 posts in 1497 days


01-20-2017 11:06 PM

Up until now, I considered myself a decent googler. However, I am having a tough time finding the connection to go from 1/4” NPT (air hoses) to copper pipe. I found a set of about 4 adapters that would work at the hardware store, but that seemed excessive.

Can somebody point me in the right direction?

-- Keith - Bolivar, Missouri, http://www.SquareOneWoodworks.com


10 replies so far

View papadan's profile

papadan

3584 posts in 3202 days


#1 posted 01-20-2017 11:28 PM

Any hardware or home store(HD/Lowes) has Sharkbite fittings. The slide onto the copper pipe and gives you the male or female threaded end to connect hoses or other fittings to. They also have straight splices for joining lengths of pipe together. If you can’t sweat solder the fittings onto the pipes then Sharkbites are for you. I use them all the time.

View BorkBob's profile

BorkBob

127 posts in 2526 days


#2 posted 01-20-2017 11:46 PM

copper “pipe” is actually tubing and is measured on the outside diameter. Pipe is measured on the inside diameter.

1/2 copper tubing is 5/8” OD

-- Please Pray for Our Troops / Semper Fi / Bob Ross / www.theborkstore.com

View papadan's profile

papadan

3584 posts in 3202 days


#3 posted 01-20-2017 11:59 PM

I’m sorry BorkBob, but…... this is tubing and…...... This is pipe.

View OSB's profile

OSB

147 posts in 360 days


#4 posted 01-21-2017 12:23 AM

I prefer Swagelok fittings.

View TheFridge's profile

TheFridge

8287 posts in 1320 days


#5 posted 01-21-2017 12:53 AM

You may have to something like a 1/2pipe to 1/2 npt male to 1/2 npt coupling to 1/2 npt x 1/4 npt reducer. Or a 1/2 X 1/4 swage if you need a male thread at the end.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View Tony_S's profile

Tony_S

765 posts in 2917 days


#6 posted 01-21-2017 10:10 AM

One of these.
http://www.supplyhouse.com/Elkhart-30320-1-2-x-1-4-Copper-x-Male-Adapter
And one of these.
http://www.homedepot.com/p/Husky-1-4-in-FNPT-x-1-4-in-I-M-Steel-Coupler-C20HOM/205332142

Bobs yer uncle….your welcome;)

Any half decent plumping outfit should stock the adapter….

-- It is the mark of an educated mind to be able to entertain a thought without accepting it. Aristotle

View diverlloyd's profile

diverlloyd

2328 posts in 1691 days


#7 posted 01-21-2017 02:51 PM

1/2”cu by 1/4” cu reducer and a 1/4” cu by 1/4 fip. That would be what I did but I had it laying around. Those are solder joints you can also order a 1/2”cu by 1/4” fip but you would need to call around. If your air hose base a female end the you would need mip instead of fip.

View splintergroup's profile

splintergroup

1687 posts in 1056 days


#8 posted 01-21-2017 03:55 PM

All my shop airlines (3/4” copper) are terminated with 1/2” MPT solder-on fittings. I then use the standard brass adapters to reduce it to the size needed (plus thread sealer/tape).

View RogR's profile

RogR

107 posts in 699 days


#9 posted 01-22-2017 03:06 PM

No dog in this fight, but curious as to why you run copper pipe for air supply?

View splintergroup's profile

splintergroup

1687 posts in 1056 days


#10 posted 01-22-2017 03:11 PM



No dog in this fight, but curious as to why you run copper pipe for air supply?

- RogR

Easy to work with and install, corrosion resistant (water vapor in the lines), malleable in case it bursts or gets dinged, etc.

Plenty of other options for fixed lines and given the current prices of copper, I’d probably use something else today.

Galvanized or other steel pipe has rusting issues which can send small flecks of rust into the air stream.

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