The Universal Replacement Gas Control is a 36C03 it is a complete gas control combined into a single compact package the functions of 3-position gas cock, pressure regulator, 100% shut-off automatic pilot, and main operator. Separate models are available for use on 24 VAC and .750 VDC systems. These controls can be mounted in any orientation except upside down. We use this control on our Modine heaters.