NGV1 Standard Filling Valve is a widely used CNG Filling valve that can be installed either at the car's rear fenders to enable refilling like in a Petrol car or also installed in Petrol filling cabinet in some cars if space permits. This is a reliable and faster way to refill your CNG vehicle.Normally the kits come with NZ (New Zealand)Standard version of filling valve which are installed under the engine hood. In case you want the NGV1 type filling valve in your car, please contact your installer.