Find the DV36 (Serial# with SIT 820 Valve [ 06NB1212 & UP ]) Majestic Gas Direct Vent Fireplace in the diagram listings shown below. Each diagram will take you direct to the DV36 (Serial# with SIT 820 Valve [ 06NB1212 & UP ]) Majestic Gas Direct Vent Fireplace repair part listings and part views for your model.