Regular maintenance is essential to ensure the safety and performance of your gas appliances. Checking and replacing hoses and connections is an important part of this maintenance routine. If you have a natural gas hose that needs replacement, such as part no. 66010, here are the steps to ensure a safe and proper replacement: **Safety First:** Before starting, always make sure the natural gas supply is turned off to the appliance you're working on. 1. **Identify the Hose:** Locate the natural gas hose that needs replacement. In your case, it's part no. 66010, which is 10 feet (103 cm) long and has a 3/8-inch (1.27 cm) quick connection. 2. **Turn Off the Gas Supply:** Ensure that the natural gas supply valve is in the "Off" position. It's typically located near the gas meter or source. 3. **Disconnect the Old Hose:** Using an adjustable wrench or pliers, carefully disconnect the old natural gas hose from both the gas source and the appliance. Turn the connections counterclockwise to loosen and disconnect them. Be prepared for a small amount of gas to escape when disconnecting. 4. **Inspect for Wear or Damage:** Examine the old hose for any signs of wear, cracking, or damage, especially near the connections and fittings. If you find any issues, it's essential to replace the entire hose. 5. **Choose the Right Replacement:** Select a replacement natural gas hose that matches the specifications of the old one. Ensure it has the same length and type of quick connection. 6. **Attach the New Hose:** Carefully attach the new natural gas hose to both the gas source and the appliance. Ensure that the connections are tight and secure. Use a wrench or pliers to make sure they are properly tightened but avoid over-tightening, which could damage the connections. 7. **Test for Leaks:** To ensure there are no gas leaks, you can perform a leak test. Mix a solution of soapy water and apply it to all the connections. If you see any bubbles forming, this indicates a leak. In such cases, immediately turn off the gas supply, tighten the connections further, and retest. 8. **Turn On the Gas Supply:** Once you've confirmed there are no leaks, you can safely turn on the natural gas supply. By regularly inspecting and replacing hoses and connections when necessary, you'll help maintain the safety and performance of your natural gas appliances, ensuring a secure and efficient gas supply.