On/Off Valves & Keys These decorative key valves can be used as a maintenance gas shutoff for an indoor fireplace or outdoor fire pit or outdoor fire features and even fireplaces. HPC offers two valve body designs- straight or angle for the versatility of your project. Come in standard capacity flow (1/2” FIP) and high capacity flow (3/4” FIP) models. These are combined with numerous flange & key color offerings and can be floor or wall-mounted.