James M Brooklyn , WI November 23, 2015 Appliance: Jenn-Air Freestanding-Double Oven-Dual Fuel JDR8895AAS Jenn-Air Range Jdr8895aas: I needed to convert my jenn air stove top range back to natural gas from lp and the orifices were not available by themselves so i needed to order new orifice holders that included the ng orifices. How to replace Orifice Holder. I had to drill out the screws that hold down the burner plates which also mount to the orifice holders because all of the screws had rusted tight and could not be loosened. The drilling out part was fairly easy and once I had removed the burner plates, I could easily lift the stove top off and get access to the orifice holders to replace all of them. I purchased new stainless steel self-threading screws from our local hardware store and re-assembled the new orifice holders and existing burner plates. I was very careful in drilling out the screws and did not damage any of the burner plates. Lastly, I had to access the gas regulator in the back of the oven to remove the plug and flip over the plug to switch the regulator to NG. The burners all work very well and I saved myself $250-300 in labor quoted by a contractor. The contractor was also going to charge me about $60 more for the orifice holders than I paid for the parts from Appliance Parts.com 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours