The brass .5 male npt connections at the end of the copper tubes are odd in that the the threaded area is with flats on both sides. (like a double D) (circle with flats on each side)
Instructions say to use teflon tape; yes, I should think so!

I really wonder why the threads are not all around the circumference.
Should I trust that the teflon tpe will make it all ok?

What is the logic of how this is machined? I do not think the store people can answer this.

the 'flats' are for wrench 'hold back' when attaching/tightening the supply tubes

the seal is NOT made on the 1/2" NPSM thread but at the FACE, which IS ROUND and 'may' also be tapered using either the rubber washer in the flex connector or the 'bull nose' of the rigid connector

why they would recommend Teflon ? ~ friction reducer? ~ no other purpose

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

If the area were completely round, the faucet supply tubes would be destroyed as the supply nut were tightened.

Yes, now I get that the face or some taper internal thing is intended to make the seal.
I have a brass female straight threaded pipe connector w/o any "lands" to butt up against. If it were threaded conventionally, and had wrench flats to hold it like the old one, I'd be ok

I will cut the connector off and solder the tubes. The given ends on the new faucet will not work with nipple connector thingies. Fewer parts when soldering.

Thanks

You know something? I have absolutely no idea what you stated in that last posting.

see: [www.brasscraft.com]


plus




faucet shank nut


equals





some brands will have Cu tube ending in the threaded 'shanks' you described

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638



Edited 1 times.

female adapters will not work on that connection.
cut off the threded ends and use 3/8 compression adapters or just use stainless flexable connectors.

Ok, which brand of faucets are you refering to? Model?


Best Wishes

"stainless flexable connectors"


a flexible braid hiding a vinyl tube

service life about 10 years - change out with every new faucet

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

It is Tuscany, (China)
I will solder the 3/8 tubing to the faucet tubing tails after I cut off the male half inch ends.

My original intent was to screw the faucet male end to female 1/2 pipe. The machining is too far unusual to use female pipe. Not even with Teflon tape. They gave it a complete D shape all along the thread length.

I am not going to bother with the plastic pex and bull nose fittings which I now realize is the mfr intent. I will solder copper up from my stops up to the copper pigleads of my new faucet.The copper tubing is already in place, so why not simply solder and skip all the fittings.

About the 1/2 ends; I do not know why they spoiled the round shape with the D flats considering wrench lands do exist on the fitting top. So much for connecting things up like pipe

After my surprise of the thread flats, I figured out what to do...just solder the pig lead tails. Everything will be okay. Thanks.

even more betterer


ps. I forgot the brand, but I once saw a faucet with Cu 'tails' with built in female sockets for soldering 3/8 OD tube

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

well, you got one on me, my friend from SC.
i have never seen CU tails expanded to recieve a male end for soldering.
i have in my possession a couple of 3/8 CU sweat extensions. expanded on one end to make it an extension.
i will never use them..

Talk about making a mountain out of a molehill. It appears you have taken a job that would require a couple of minutes and are making a project out of it. Hopefully the tubes are 3/8", and NOT metric which most foreign companies use.

The only thing I have ever seen was old European faucets with metric tubes. You had to swedge them to 3/8" and solder a 3/8" stub in to convert to US dimensions.

maybe my memory confused with the ?older? Delta compression ends !!??

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

The new ones, as with many other manufacturers, are 3/8" compression, and the tubes are long enough to usually reach the angle stops to make a single connection.