Cutting threads on black pipe for compressor airline

[darkzero]

Ok, what am I missing?

Lowes 1/2" black pipe 10'L - $10.62
Lowes Pipe

Lowes 1/2" black pipe 10'L - $22.08
Lowes Pipe

They are listed with the same dimensions but one is double the cost.

And I did check a local plumbing supplier and they do have pieces that are 21' in length, but those pieces are about $38 each.

The description for the second link is wrong, it's a larger dia pipe. Look at the p/n.

For LDR

314: black
315: glavanized
12X120: 1/2" x 10'
114X120: 1-1/4" x 10'

 

[4rcFed]

I think you're right....or at least you should be!!!

I happened to see that in a store the other day, so basically it is about $1/foot. While I'd rather have less connections and go and buy a 21' piece from the plumbing supply place, I think I'll just use these pieces as the pricing isn't bad.

 

[4rcFed]

I am a Lowe's guy, but since we moved, Home Depot is way closer. But I checked with the local HD store and they do cut threads for free, when you buy the pipe. So I may do some good measurements and let them do the first few pieces and see if that process works.

 

[bob15]

American made or Canada made black iron pipe and fittings can be bought at MSC supply. Much better than china junk.

http://www1.mscdirect.com/CGI/NNPDFF?PMPAGE=4002&PMITEM=36989986&PMCTLG=00

A_Pmech, the picture of your lathe turned pipe looks like NPS and not NPT, The threads should show more taper.

 

[saabman]

I use dope on the threads and dont have a problem with leaking. 3/4 inch for the main lines and 1/2 for drops. Check out the filter/regulator metal line kits from TPTOOLS http://www.tptools.com/p/99,114_Coalescing-Filter-and-Regulator-Piping-Kit.html I have a couple of these in addtion to wall and ceiling mounted hose reels.