For reliability, performance, flexibility and ease of installation and service in one compact control, robertshaw's 24 volt combination gas valves are the answer. These valves feature a manual valve (gas cock), an automatic pilot safety valve, inlet/outlet screens, pilot outlet, pilot gas filter and pilot adjustment key. Models that have a safety magnet have a "notched or slotted" magnet for applications requiring the use of an eco (energy cut-off) switch. The automatic pilot safety valve is separate from the gas cock and provides gas shutoff in case of pilot outage. Valves can be mounted in any position except upside down.