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)
1/2" PEX x 1/2" PEX Ball Valve, T-Handle (Lead Free)