Proline, 1/2", Brass, Copper x Copper Stop & Waste Valve, Heavy Duty Construction, Screw Over Bonnet, For Use With Water, Oil, Or Air, Neoprene Seal Washer, Large Flow Area, Large Cast Iron Handle, Allows Draining Of Non-Pressure Side Of Valve When Closed, Solder Ends Comply With ANSI B16.18.