Gardensun Service Center and Gardensun USA Developing LLC is not liable or responsible for any damages or harm done by the improper installation of our gas heater parts and accessories. In purchasing these parts, you are agreeing to our terms of service and are solely responsible on how you use our products. We recommend to get these parts installed by a professional in order to make sure everything is safe and secure. Take especially good care when installing or working with anything involving the valves, elbows, pilot feed tube. These need to be secure and we would recommend using a thread lock paste when tightening these down.