Combination Multi-function Controls for a Wide Range of Applications. The 36H Combination Gas Control Valve is a Versatile Multifunction Control Designed to Meet the Requirements for Use with Intermittent Ignition Systems (Direct Ignition, Proven Pilot, HSI). 36H is ourHighest Capacity Combination Gas Valve.Features: Adjustable regulator. Quiet operation redundant design. Inlet/outlet screens. Tamper resistant screws.