Full Port Brass PEX Ball Valves. Feature Teflon seats and ¼ turn steel handles. Both sides of the PEX valves are equal PEX connections. Can be used with all types of ASTM F876/877 PEX tubing. Compatible with both PEX Crimp connection system and PEX Clamp (Cinch) connection system. Size - 1/2" PEX x 1/2" PEX Brass Ball Valve, Full Port - 3/4" PEX x 3/4" PEX Brass Ball Valve, Full Port - 1" PEX x 1" PEX Brass Ball Valve, Full Port, 1/4" turn