Pilot Light Won t Stay Lit How to Replace a Broken Thermo Couple on Furnace What you see in the pictures is the item that you will be receiving! You are looking at Vermont Castings Honeywell VS8421D Vent Free Gas Valve Natural Gas w/ Sparker. This item is in the category Home & Garden\Home Improvement\Heating, Cooling & Air\Fireplaces & Stoves\Fireplace & Stove Replacement Parts.