You have the unique need. Here is what you ideally want.

Your adapter need to go from 1/2" Male to a 3/8" female Its a big weird to reduce the pipe side in that direction. Not much out there, other than cobbling something together yourself with two or more parts. I did find the linked amazon product. You need the one on the right in that image.

Other than that, I feel like a plumbing store will tell you to just replace the shut-off valve. and that might actually be a good option if it is easy to access and even easier if it isn't soldered onto copper pipe.... but I bet it is with that odd size.

In response to this post by Hurley09

Posted: 07/18/2019 at 3:46PM

Alright plumbers, I need your help. Having trouble installing the new sink -- Hurley09 07/18/2019 2:33PM

Use a plumber. That's why God created them. ** -- 133743Hokie 07/18/2019 11:00PM

...go talk to Comet on Cleveland St. ** -- chumley 07/18/2019 5:54PM

Think he lives in NOVA ** -- EDGEMAN 07/18/2019 7:13PM

Yeah, but Comet is worth the drive. ** -- IB4TECH 07/18/2019 9:24PM

You should go to a real plumbing store, not the big boxes -- calihokie 07/18/2019 4:32PM

If you can find a ferguson's in your area, they can help you. Link inside -- calihokie 07/18/2019 4:34PM

We have a Noland ** -- TomTurkey 07/18/2019 4:53PM

Sharkbite. -- PhotoHokieNC 07/18/2019 3:51PM

Stuff is a bit pricey, but does beat the solder aspect of copper.. ** -- turkeywinghokie 07/18/2019 4:16PM

Yep ** -- PhotoHokieNC 07/18/2019 4:21PM

You have the unique need. Here is what you ideally want. -- HokieSignGuy 07/18/2019 3:46PM

Not a horrible idea to replace the shutoff valve anyway, esp if it is -- Tafkam Hokie 07/18/2019 4:04PM

Check with a real plumbing supply store ** -- TomTurkey 07/18/2019 3:12PM

Yup. Most areas have a "do it yourself" plumbing supply store. They'll hook -- Stork 07/18/2019 3:45PM

Good call gents. Found one in Falls Church that I'll swing by tomorrow. ** -- Hurley09 07/18/2019 4:30PM

Given where you live, I'm surprised no one suggested the Nixon Whitehouse. ** -- PhotoHokieNC 07/18/2019 4:48PM

There's a good audio instruction tape - about 18 minutes in length ** -- TomTurkey 07/18/2019 4:55PM

I thought that was the Rosemary Woods stretchercise video. ** -- PhotoHokieNC 07/18/2019 5:04PM

½" female to 3/8" male adapter? Try this... -- Major Kong 07/18/2019 2:47PM

Duct tape. ** -- ArdbegHokie 07/18/2019 2:45PM

This is a plumbing job. Flex Tape, not Duct Tape. ** -- Tafkam Hokie 07/18/2019 3:27PM

Ahh, good point. ** -- ArdbegHokie 07/18/2019 3:28PM

Bubble gum, then duct tape. The order is important here. ** -- King Jaffe Joffer 07/18/2019 2:48PM

Then bend a paper clip around it all for added support. ** -- HokieNoVA 07/18/2019 3:41PM

You have the unique need. Here is what you ideally want.

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