7/16 copper fittings

[Bentpushrod]

First post. I'm in the middle of a bathroom remodel. My house was built in the 1960's. Tonight, I removed the old sink. No valves, so I shut off the main and cut the copper pipe. Went to put on some Irwin quick connect 1/2 valves, and to my surprise they were to big. 3/8 is to small. Pinched off the pipes, and soldered them closed. Now I'm at a loss. Does anybody know if anybody makes a 7/16 to 1/2 adapter I can solder on? To rip out the old pipe will be a major undertaking, as the previous owner added a room in the basement below this bathroom, with a staircase on the other side. To access the pipe, I'll have to remove the subfloor in the bathroom, or rip out the Sheetrock in the room below. Any help is greatly appreciated.

 

[hj]

How about a photo, because 7/16 would normally ONLY be used for the connection from the wall to the faucet and there are FEW 7/16 fittings and they are almost all automotive compression.

 

[Sponsor]

 

[Asktom]

7/16" x 3/8" compression x MIP are available and could be used with a 3/8" FIP stop or bushed up to 1/2".

 

[DougB]

Does anybody know if anybody makes a 7/16 to 1/2 adapter I can solder on?

7/16 was used on refrigeration systems - a long time ago. Maybe an HVAC supply house. I'm sure if you Google it, you will find 7/16" compression adapters, and maybe a 7/16 x 3/8 sweat adapter.

 

[hj]

The real question is WHERE did the installer ever find 7/16" tubing to use it, if that is really what it is? if it were refrigeration tubing it would be thin wall ACR, not type K or L.

 

[DougB]

The real question is WHERE did the installer ever find 7/16" tubing to use it, if that is really what it is? if it were refrigeration tubing it would be thin wall ACR, not type K or L.

ACR is L wall copper - Automatically Cleaned and Reamed. I remember 7/16" (there was also 3/16 and 5/16 - you could get 5/16 fittings) - it was soft copper - must have been sitting in our warehouse since before I was born (1949). We had a few sweat and flare fittings to take it to 3/8" or 1/2" OD.

I was thinking - if he could use a swaging tool - to get it to 3/8" ID and then solder 3/8" OD copper.

http://www.ebay.com/itm/PIPE-TUBE-S...NG-EXPANDING-COPPER-TUBING-HVAC-/261642553383

 

[Asktom]

In the Los Angeles area, back in the day, 7/16" supply tube was used to hook up faucets, toilets and such. It was common to also see dishwashers hooked up with 7/16". That "spaghetti" came/comes in 6ft lengths so if the run was short that may be what the OP is dealing with.

 

[Bentpushrod]

This is what I'm dealing with. Before I rip the floor out, I'm going to try and sleeve this smaller pipe with 1/2" and solder the sleeve in place. I'll do it up high to see if it works, if it does, then I will cut it down by floor level, and do sleeves on both so I can attach my 1/2 valves to the stubs.

 

[Bentpushrod]

I may have to pick up one of those swage tools. Thanks for the link!

 

[Bentpushrod]

Stopped in a supply house today. Got some refrigeration couplers. 1/2 X 5/8 id couplers. Worked like a charm!