Watts 1/4-in Push-to-Connect Tee, 2-1/2-in Length, for Copper, CPVC, PEX, Polybutylene, PVC Schedule 40 in the Push to Connect Fittings department at Lowes.com
LFWP18B-120808 - Watts
Watts Radiant Pex PC690004 Swivel Fitting
Watts PEX LFP-555 Angle Stop Valve 3/8-Inch OD x 1/2-Inch PEX Low-Lead, Chrome - Faucet Valves - Amazon.com
Watts Water 3552-0806/P-672 In-Line Valve, 1/2 By 1/4 in Connection, Nps By Cts, 250 Psi Pressure, Thermoplastic Body: Polysulfone Plastic Push It Fittings (098268322668-1)