Plumbing - PEX ShutOff Half Inch
These will be mounted in the bathroom/kitchen/utility cabinets under the sink.
They are available with screw mounting lugs but they cost twice as much...
1/2" PEX Crimp Drop Ear Ball Valve (Lead Free)
https://www.supplyhouse.com/Matco-Norca-754PXDE03LF-1-2-PEX-Ball-Valve-w-Waste-Drain-Drop-Ear-Elbow $4.89 Lead-free
3/4"
https://www.supplyhouse.com/Matco-Norca-754PXDE04LF-3-4-PEX-Ball-Valve-w-Waste-Drain-Drop-Ear-Elbow $7.36