The Celestial 3/8 in. male flare to 1/2 in. FIP (NPT) female brass coupler is intended for connecting gas hoses with 3/8 in. flared fittings to 1/2 in. NPT fittings. DIY gas fire pit components such as fire pit burners, key valves and air mixers are standardized on 1/2 in. NPT threads. The NPT threads on this brass fitting are tapered to provide a tight seal whereas, flared fittings have a flared tip which presses against an inverted flare to provide the seal. This brass gas line fitting will allow you to easily connect these components together. Keep in mind that with the NPT tapered threads you have to use yellow Teflon gas tape on the threads. With the flared fitting you are not to use Teflon tape. This brass flared coupler fitting is suitable for propane and natural gas. Perfect for connecting most gas flex fittings to your DIY fire pit burner pan. Flex hoses are typically 3/8 in. flared, while gas fire pit burners are 1/2 in. tapered-this adapter will bring the 2 together and make your propane fire pit project a success. This 3/8 to 1/2 gas line adapter is popular with DIY gas fire pit builders because of it's high quality of brass (not all brass is equal). The higher quality of brass in this 3/8 to 1/2 propane adapter will ensure you a leak free connection for many years. When looking for a 1/2 in. to 3/8 in. gas line adapter, only settle for the best quality. Celestial Fire Glass backs all our DIY gas fire pit components with a limited lifetime warranty.