The Nowa valves are the essential part of the Nowa systems. When a leak is received by the Nowa 360 hub, a close signal is sent to the valve to shut off the main water line limiting the damages to a small puddle near the leak. Since 2010, the valve design has been improved to be the most reliable automatic shut off valve on the market. The valve body is all in stainless steel and certified NSF61, which makes it durable and not harmful for human water consumption. The full port ball valve design removes all water restriction, which means you won’t notice a new valve has been installed.