
To operate the valves, unscrew the two knurled screws and remove the service cover. Open or close manual valves as desired. Gas Leak Test After piping and fittings have been installed, check for gas leaks. A simple checking method is to turn on the gas and brush all connections with a soap solution. The appearance of bubbles indicates escaping gas. In this event, the piping connection must be redone until no bubbles occur. Never use a lighted match or open flame to test for gas leaks. Escaping